/usr/bin/java -Xmx8000000000 -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.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-?-bc289cb [2022-01-28 14:49:26,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 14:49:26,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 14:49:26,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 14:49:26,931 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.epf [2022-01-28 14:49:26,950 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 14:49:26,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 14:49:26,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 14:49:26,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 14:49:26,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 14:49:26,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 14:49:26,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 14:49:26,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 14:49:26,953 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 14:49:26,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 14:49:26,954 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 14:49:26,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 14:49:26,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 14:49:26,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 14:49:26,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 14:49:26,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 14:49:26,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 14:49:26,955 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 14:49:26,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 14:49:26,955 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 14:49:26,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 14:49:26,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 14:49:26,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 14:49:26,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 14:49:26,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 14:49:26,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:49:26,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 14:49:26,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 14:49:26,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 14:49:26,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 14:49:26,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 14:49:26,957 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 14:49:26,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 14:49:26,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 14:49:27,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 14:49:27,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 14:49:27,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 14:49:27,165 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 14:49:27,166 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 14:49:27,167 INFO L432 ainManager$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 [2022-01-28 14:49:27,167 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-trans.wvr.bpl' [2022-01-28 14:49:27,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 14:49:27,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 14:49:27,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 14:49:27,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 14:49:27,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 14:49:27,200 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 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,206 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 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,211 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 14:49:27,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 14:49:27,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 14:49:27,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 14:49:27,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 14:49:27,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 14:49:27,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 14:49:27,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 14:49:27,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 14:49:27,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:49:27" (1/1) ... [2022-01-28 14:49:27,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:49:27,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:27,260 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) [2022-01-28 14:49:27,279 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 [2022-01-28 14:49:27,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 14:49:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 14:49:27,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 14:49:27,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 14:49:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 14:49:27,302 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 14:49:27,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 14:49:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 14:49:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 14:49:27,303 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 14:49:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 14:49:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 14:49:27,304 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 14:49:27,343 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 14:49:27,344 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 14:49:27,430 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 14:49:27,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 14:49:27,471 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-28 14:49:27,474 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:49:27 BoogieIcfgContainer [2022-01-28 14:49:27,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 14:49:27,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 14:49:27,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 14:49:27,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 14:49:27,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:49:27" (1/2) ... [2022-01-28 14:49:27,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f963f57 and model type chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:49:27, skipping insertion in model container [2022-01-28 14:49:27,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:49:27" (2/2) ... [2022-01-28 14:49:27,487 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-trans.wvr.bpl [2022-01-28 14:49:27,491 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 14:49:27,491 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 14:49:27,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 14:49:27,491 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 14:49:27,534 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-28 14:49:27,568 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 14:49:27,574 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 [2022-01-28 14:49:27,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-28 14:49:27,581 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-01-28 14:49:27,624 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) [2022-01-28 14:49:27,627 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) [2022-01-28 14:49:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 14:49:27,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:27,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:27,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:27,639 INFO L85 PathProgramCache]: Analyzing trace with hash 322758138, now seen corresponding path program 1 times [2022-01-28 14:49:27,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:27,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027910881] [2022-01-28 14:49:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:27,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:27,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:27,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027910881] [2022-01-28 14:49:27,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027910881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:27,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:27,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:49:27,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250760209] [2022-01-28 14:49:27,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:27,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:49:27,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:49:27,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:49:27,945 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) [2022-01-28 14:49:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:28,026 INFO L93 Difference]: Finished difference Result 194 states and 539 transitions. [2022-01-28 14:49:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:49:28,029 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 [2022-01-28 14:49:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:28,038 INFO L225 Difference]: With dead ends: 194 [2022-01-28 14:49:28,039 INFO L226 Difference]: Without dead ends: 178 [2022-01-28 14:49:28,040 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 [2022-01-28 14:49:28,043 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 [2022-01-28 14:49:28,044 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] [2022-01-28 14:49:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-28 14:49:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2022-01-28 14:49:28,113 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) [2022-01-28 14:49:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 325 transitions. [2022-01-28 14:49:28,116 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 325 transitions. Word has length 17 [2022-01-28 14:49:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:28,116 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 325 transitions. [2022-01-28 14:49:28,117 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) [2022-01-28 14:49:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 325 transitions. [2022-01-28 14:49:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 14:49:28,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:28,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:28,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 14:49:28,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash 904983988, now seen corresponding path program 2 times [2022-01-28 14:49:28,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:28,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980184749] [2022-01-28 14:49:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:28,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:28,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980184749] [2022-01-28 14:49:28,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980184749] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:28,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:28,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:49:28,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675834282] [2022-01-28 14:49:28,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:28,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:49:28,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:49:28,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:49:28,185 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) [2022-01-28 14:49:28,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:28,265 INFO L93 Difference]: Finished difference Result 193 states and 552 transitions. [2022-01-28 14:49:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:49:28,265 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 [2022-01-28 14:49:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:28,272 INFO L225 Difference]: With dead ends: 193 [2022-01-28 14:49:28,272 INFO L226 Difference]: Without dead ends: 193 [2022-01-28 14:49:28,273 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 [2022-01-28 14:49:28,274 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:28,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:49:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-28 14:49:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 129. [2022-01-28 14:49:28,287 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) [2022-01-28 14:49:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-01-28 14:49:28,289 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-01-28 14:49:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:28,289 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-01-28 14:49:28,289 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) [2022-01-28 14:49:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-01-28 14:49:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-28 14:49:28,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:28,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:28,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-28 14:49:28,291 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1463195370, now seen corresponding path program 3 times [2022-01-28 14:49:28,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:28,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042217154] [2022-01-28 14:49:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:28,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:28,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:28,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042217154] [2022-01-28 14:49:28,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042217154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:28,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:28,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:49:28,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589473035] [2022-01-28 14:49:28,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:28,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:49:28,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:49:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:49:28,357 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) [2022-01-28 14:49:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:28,446 INFO L93 Difference]: Finished difference Result 238 states and 687 transitions. [2022-01-28 14:49:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:49:28,447 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 [2022-01-28 14:49:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:28,449 INFO L225 Difference]: With dead ends: 238 [2022-01-28 14:49:28,449 INFO L226 Difference]: Without dead ends: 238 [2022-01-28 14:49:28,449 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 [2022-01-28 14:49:28,450 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:28,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 21 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:49:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-28 14:49:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 149. [2022-01-28 14:49:28,463 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) [2022-01-28 14:49:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 435 transitions. [2022-01-28 14:49:28,465 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 435 transitions. Word has length 17 [2022-01-28 14:49:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:28,465 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 435 transitions. [2022-01-28 14:49:28,465 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) [2022-01-28 14:49:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 435 transitions. [2022-01-28 14:49:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:49:28,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:28,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:28,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 14:49:28,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:28,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1870215385, now seen corresponding path program 1 times [2022-01-28 14:49:28,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:28,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204083587] [2022-01-28 14:49:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:28,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:49:28,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:28,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204083587] [2022-01-28 14:49:28,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204083587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:28,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:28,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:49:28,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227602596] [2022-01-28 14:49:28,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:28,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:49:28,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:49:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:49:28,533 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) [2022-01-28 14:49:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:28,575 INFO L93 Difference]: Finished difference Result 237 states and 697 transitions. [2022-01-28 14:49:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 14:49:28,576 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 [2022-01-28 14:49:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:28,578 INFO L225 Difference]: With dead ends: 237 [2022-01-28 14:49:28,578 INFO L226 Difference]: Without dead ends: 178 [2022-01-28 14:49:28,578 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 [2022-01-28 14:49:28,580 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 [2022-01-28 14:49:28,580 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] [2022-01-28 14:49:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-28 14:49:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-01-28 14:49:28,592 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) [2022-01-28 14:49:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2022-01-28 14:49:28,594 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 18 [2022-01-28 14:49:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:28,594 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2022-01-28 14:49:28,594 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) [2022-01-28 14:49:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2022-01-28 14:49:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:49:28,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:28,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:28,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 14:49:28,596 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash 239156717, now seen corresponding path program 1 times [2022-01-28 14:49:28,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:28,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743907771] [2022-01-28 14:49:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:28,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:49:28,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:28,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743907771] [2022-01-28 14:49:28,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743907771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:28,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:28,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:49:28,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555130185] [2022-01-28 14:49:28,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:28,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:49:28,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:28,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:49:28,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:49:28,665 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) [2022-01-28 14:49:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:28,741 INFO L93 Difference]: Finished difference Result 199 states and 585 transitions. [2022-01-28 14:49:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:49:28,742 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 [2022-01-28 14:49:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:28,748 INFO L225 Difference]: With dead ends: 199 [2022-01-28 14:49:28,748 INFO L226 Difference]: Without dead ends: 199 [2022-01-28 14:49:28,749 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 [2022-01-28 14:49:28,757 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 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 [2022-01-28 14:49:28,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:49:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-28 14:49:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-01-28 14:49:28,783 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) [2022-01-28 14:49:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 585 transitions. [2022-01-28 14:49:28,784 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 585 transitions. Word has length 19 [2022-01-28 14:49:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:28,785 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 585 transitions. [2022-01-28 14:49:28,785 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) [2022-01-28 14:49:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 585 transitions. [2022-01-28 14:49:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:49:28,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:28,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:28,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 14:49:28,787 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash -11164707, now seen corresponding path program 2 times [2022-01-28 14:49:28,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447097161] [2022-01-28 14:49:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:28,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:49:28,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:28,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447097161] [2022-01-28 14:49:28,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447097161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:28,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:28,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:49:28,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595264311] [2022-01-28 14:49:28,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:28,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:49:28,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:49:28,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:49:28,873 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) [2022-01-28 14:49:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:28,967 INFO L93 Difference]: Finished difference Result 303 states and 870 transitions. [2022-01-28 14:49:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:49:28,969 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 [2022-01-28 14:49:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:28,973 INFO L225 Difference]: With dead ends: 303 [2022-01-28 14:49:28,973 INFO L226 Difference]: Without dead ends: 303 [2022-01-28 14:49:28,973 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 [2022-01-28 14:49:28,976 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 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 [2022-01-28 14:49:28,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 24 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:49:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-28 14:49:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 206. [2022-01-28 14:49:28,999 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) [2022-01-28 14:49:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 613 transitions. [2022-01-28 14:49:29,001 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 613 transitions. Word has length 19 [2022-01-28 14:49:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:29,001 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 613 transitions. [2022-01-28 14:49:29,002 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) [2022-01-28 14:49:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 613 transitions. [2022-01-28 14:49:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:49:29,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:29,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:29,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-28 14:49:29,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 575750895, now seen corresponding path program 3 times [2022-01-28 14:49:29,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:29,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244439513] [2022-01-28 14:49:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:29,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:49:29,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244439513] [2022-01-28 14:49:29,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244439513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:29,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:29,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:49:29,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882539075] [2022-01-28 14:49:29,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:29,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:49:29,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:29,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:49:29,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:49:29,066 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) [2022-01-28 14:49:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:29,122 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2022-01-28 14:49:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:49:29,122 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 [2022-01-28 14:49:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:29,124 INFO L225 Difference]: With dead ends: 219 [2022-01-28 14:49:29,124 INFO L226 Difference]: Without dead ends: 206 [2022-01-28 14:49:29,124 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 [2022-01-28 14:49:29,125 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 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 [2022-01-28 14:49:29,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 21 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:49:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-28 14:49:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-01-28 14:49:29,132 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) [2022-01-28 14:49:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 606 transitions. [2022-01-28 14:49:29,133 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 606 transitions. Word has length 19 [2022-01-28 14:49:29,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:29,134 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 606 transitions. [2022-01-28 14:49:29,134 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) [2022-01-28 14:49:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 606 transitions. [2022-01-28 14:49:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:49:29,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:29,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:29,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-28 14:49:29,136 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2059614901, now seen corresponding path program 4 times [2022-01-28 14:49:29,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:29,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843178233] [2022-01-28 14:49:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:29,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:49:29,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:29,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843178233] [2022-01-28 14:49:29,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843178233] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:29,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:29,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:49:29,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692098941] [2022-01-28 14:49:29,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:29,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:49:29,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:49:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:49:29,189 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) [2022-01-28 14:49:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:29,268 INFO L93 Difference]: Finished difference Result 301 states and 859 transitions. [2022-01-28 14:49:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:49:29,268 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 [2022-01-28 14:49:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:29,270 INFO L225 Difference]: With dead ends: 301 [2022-01-28 14:49:29,270 INFO L226 Difference]: Without dead ends: 301 [2022-01-28 14:49:29,270 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 [2022-01-28 14:49:29,271 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-01-28 14:49:29,271 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] [2022-01-28 14:49:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-28 14:49:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 214. [2022-01-28 14:49:29,287 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) [2022-01-28 14:49:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 638 transitions. [2022-01-28 14:49:29,288 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 638 transitions. Word has length 19 [2022-01-28 14:49:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:29,288 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 638 transitions. [2022-01-28 14:49:29,288 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) [2022-01-28 14:49:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 638 transitions. [2022-01-28 14:49:29,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:49:29,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:29,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:29,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-28 14:49:29,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1648436793, now seen corresponding path program 5 times [2022-01-28 14:49:29,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:29,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020153265] [2022-01-28 14:49:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:29,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:49:29,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:29,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020153265] [2022-01-28 14:49:29,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020153265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:29,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:29,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:49:29,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723107086] [2022-01-28 14:49:29,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:29,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:49:29,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:29,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:49:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:49:29,367 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) [2022-01-28 14:49:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:29,439 INFO L93 Difference]: Finished difference Result 314 states and 878 transitions. [2022-01-28 14:49:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:49:29,439 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 [2022-01-28 14:49:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:29,442 INFO L225 Difference]: With dead ends: 314 [2022-01-28 14:49:29,442 INFO L226 Difference]: Without dead ends: 301 [2022-01-28 14:49:29,443 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 [2022-01-28 14:49:29,445 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:29,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:49:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-28 14:49:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 207. [2022-01-28 14:49:29,452 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) [2022-01-28 14:49:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 610 transitions. [2022-01-28 14:49:29,453 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 610 transitions. Word has length 19 [2022-01-28 14:49:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:29,453 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 610 transitions. [2022-01-28 14:49:29,454 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) [2022-01-28 14:49:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 610 transitions. [2022-01-28 14:49:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:49:29,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:29,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:29,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-28 14:49:29,455 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:29,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2108674925, now seen corresponding path program 6 times [2022-01-28 14:49:29,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:29,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041117953] [2022-01-28 14:49:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:29,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:49:29,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:29,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041117953] [2022-01-28 14:49:29,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041117953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:29,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:29,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:49:29,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7220361] [2022-01-28 14:49:29,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:29,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:49:29,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:29,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:49:29,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:49:29,503 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) [2022-01-28 14:49:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:29,549 INFO L93 Difference]: Finished difference Result 231 states and 656 transitions. [2022-01-28 14:49:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:49:29,549 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 [2022-01-28 14:49:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:29,550 INFO L225 Difference]: With dead ends: 231 [2022-01-28 14:49:29,550 INFO L226 Difference]: Without dead ends: 195 [2022-01-28 14:49:29,551 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 [2022-01-28 14:49:29,551 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 [2022-01-28 14:49:29,552 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] [2022-01-28 14:49:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-28 14:49:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-01-28 14:49:29,557 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) [2022-01-28 14:49:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2022-01-28 14:49:29,558 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2022-01-28 14:49:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:29,558 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2022-01-28 14:49:29,558 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) [2022-01-28 14:49:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2022-01-28 14:49:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:49:29,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:29,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:29,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-28 14:49:29,560 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1791885482, now seen corresponding path program 1 times [2022-01-28 14:49:29,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:29,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906544872] [2022-01-28 14:49:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:29,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:49:29,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:29,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906544872] [2022-01-28 14:49:29,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906544872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:29,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:29,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:49:29,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10215899] [2022-01-28 14:49:29,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:29,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:49:29,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:49:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:49:29,605 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) [2022-01-28 14:49:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:29,673 INFO L93 Difference]: Finished difference Result 213 states and 621 transitions. [2022-01-28 14:49:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:49:29,673 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 [2022-01-28 14:49:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:29,675 INFO L225 Difference]: With dead ends: 213 [2022-01-28 14:49:29,675 INFO L226 Difference]: Without dead ends: 213 [2022-01-28 14:49:29,675 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 [2022-01-28 14:49:29,676 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 [2022-01-28 14:49:29,677 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] [2022-01-28 14:49:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-28 14:49:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 189. [2022-01-28 14:49:29,682 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) [2022-01-28 14:49:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-01-28 14:49:29,683 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-01-28 14:49:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:29,683 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-01-28 14:49:29,683 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) [2022-01-28 14:49:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-01-28 14:49:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 14:49:29,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:29,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:29,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-28 14:49:29,685 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash 779192950, now seen corresponding path program 2 times [2022-01-28 14:49:29,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:29,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405893351] [2022-01-28 14:49:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:29,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:49:29,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405893351] [2022-01-28 14:49:29,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405893351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:49:29,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:49:29,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:49:29,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122004323] [2022-01-28 14:49:29,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:49:29,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:49:29,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:29,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:49:29,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:49:29,751 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) [2022-01-28 14:49:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:29,813 INFO L93 Difference]: Finished difference Result 231 states and 675 transitions. [2022-01-28 14:49:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 14:49:29,814 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 [2022-01-28 14:49:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:29,815 INFO L225 Difference]: With dead ends: 231 [2022-01-28 14:49:29,815 INFO L226 Difference]: Without dead ends: 231 [2022-01-28 14:49:29,815 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 [2022-01-28 14:49:29,816 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 [2022-01-28 14:49:29,816 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] [2022-01-28 14:49:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-28 14:49:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 189. [2022-01-28 14:49:29,826 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) [2022-01-28 14:49:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-01-28 14:49:29,828 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-01-28 14:49:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:29,828 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-01-28 14:49:29,828 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) [2022-01-28 14:49:29,828 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-01-28 14:49:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:29,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:29,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:29,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-28 14:49:29,830 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash -356903725, now seen corresponding path program 1 times [2022-01-28 14:49:29,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:29,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142235805] [2022-01-28 14:49:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:29,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:30,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:30,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142235805] [2022-01-28 14:49:30,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142235805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:30,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904530946] [2022-01-28 14:49:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:30,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:30,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:30,039 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) [2022-01-28 14:49:30,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 14:49:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:30,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:30,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:30,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:30,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:30,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:30,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:30,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:30,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:30,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:30,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:30,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:30,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904530946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:30,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:30,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:30,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704016648] [2022-01-28 14:49:30,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:30,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:30,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:30,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:30,875 INFO L87 Difference]: Start difference. First operand 189 states and 549 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) [2022-01-28 14:49:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:32,036 INFO L93 Difference]: Finished difference Result 555 states and 1605 transitions. [2022-01-28 14:49:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:49:32,037 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 [2022-01-28 14:49:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:32,040 INFO L225 Difference]: With dead ends: 555 [2022-01-28 14:49:32,040 INFO L226 Difference]: Without dead ends: 525 [2022-01-28 14:49:32,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:49:32,041 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 182 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:32,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 235 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 630 Invalid, 0 Unknown, 167 Unchecked, 0.4s Time] [2022-01-28 14:49:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-28 14:49:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 211. [2022-01-28 14:49:32,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.9047619047619047) internal successors, (610), 210 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) [2022-01-28 14:49:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 610 transitions. [2022-01-28 14:49:32,050 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 610 transitions. Word has length 20 [2022-01-28 14:49:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:32,051 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 610 transitions. [2022-01-28 14:49:32,051 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) [2022-01-28 14:49:32,051 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 610 transitions. [2022-01-28 14:49:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:32,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:32,052 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] [2022-01-28 14:49:32,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:32,271 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 [2022-01-28 14:49:32,272 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1995363379, now seen corresponding path program 2 times [2022-01-28 14:49:32,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:32,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819220379] [2022-01-28 14:49:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:32,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:32,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:32,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819220379] [2022-01-28 14:49:32,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819220379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:32,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977239796] [2022-01-28 14:49:32,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:49:32,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:32,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:32,454 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) [2022-01-28 14:49:32,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 14:49:32,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:32,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:32,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:32,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:32,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:32,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:32,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:32,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:32,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:33,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:33,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:33,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:33,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:33,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977239796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:33,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:33,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:33,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134731604] [2022-01-28 14:49:33,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:33,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:33,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:33,080 INFO L87 Difference]: Start difference. First operand 211 states and 610 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) [2022-01-28 14:49:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:33,776 INFO L93 Difference]: Finished difference Result 417 states and 1202 transitions. [2022-01-28 14:49:33,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:49:33,776 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 [2022-01-28 14:49:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:33,778 INFO L225 Difference]: With dead ends: 417 [2022-01-28 14:49:33,778 INFO L226 Difference]: Without dead ends: 387 [2022-01-28 14:49:33,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:49:33,779 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:33,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 288 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 755 Invalid, 0 Unknown, 112 Unchecked, 0.4s Time] [2022-01-28 14:49:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-28 14:49:33,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 215. [2022-01-28 14:49:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.9065420560747666) internal successors, (622), 214 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 622 transitions. [2022-01-28 14:49:33,787 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 622 transitions. Word has length 20 [2022-01-28 14:49:33,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:33,787 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 622 transitions. [2022-01-28 14:49:33,787 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) [2022-01-28 14:49:33,787 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 622 transitions. [2022-01-28 14:49:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:33,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:33,788 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] [2022-01-28 14:49:33,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:34,007 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 [2022-01-28 14:49:34,008 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash 997300179, now seen corresponding path program 3 times [2022-01-28 14:49:34,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:34,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877621672] [2022-01-28 14:49:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:34,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:34,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:34,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877621672] [2022-01-28 14:49:34,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877621672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:34,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859560605] [2022-01-28 14:49:34,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:49:34,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:34,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:34,219 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) [2022-01-28 14:49:34,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 14:49:34,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:49:34,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:34,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:49:34,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:34,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:49:34,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:34,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:34,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:34,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:34,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:34,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:34,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:34,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:34,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:34,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:34,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:35,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859560605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:35,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:35,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:35,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143518218] [2022-01-28 14:49:35,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:35,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:35,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:35,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:35,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:35,031 INFO L87 Difference]: Start difference. First operand 215 states and 622 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) [2022-01-28 14:49:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:36,576 INFO L93 Difference]: Finished difference Result 489 states and 1392 transitions. [2022-01-28 14:49:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 14:49:36,576 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 [2022-01-28 14:49:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:36,579 INFO L225 Difference]: With dead ends: 489 [2022-01-28 14:49:36,579 INFO L226 Difference]: Without dead ends: 444 [2022-01-28 14:49:36,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=389, Invalid=1591, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 14:49:36,580 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:36,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 271 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:49:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-28 14:49:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 232. [2022-01-28 14:49:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.909090909090909) internal successors, (672), 231 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 672 transitions. [2022-01-28 14:49:36,588 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 672 transitions. Word has length 20 [2022-01-28 14:49:36,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:36,588 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 672 transitions. [2022-01-28 14:49:36,589 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) [2022-01-28 14:49:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 672 transitions. [2022-01-28 14:49:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:36,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:36,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:36,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:36,790 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 [2022-01-28 14:49:36,790 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:36,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:36,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1270231183, now seen corresponding path program 4 times [2022-01-28 14:49:36,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:36,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905378603] [2022-01-28 14:49:36,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:36,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:36,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:36,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905378603] [2022-01-28 14:49:36,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905378603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:36,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555581725] [2022-01-28 14:49:36,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:49:36,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:36,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:36,977 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) [2022-01-28 14:49:36,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 14:49:37,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:49:37,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:37,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:37,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:37,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:49:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:37,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:37,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:37,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:37,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:37,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:37,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:37,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:37,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555581725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:37,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:37,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:37,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270660589] [2022-01-28 14:49:37,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:37,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:37,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:37,514 INFO L87 Difference]: Start difference. First operand 232 states and 672 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) [2022-01-28 14:49:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:38,567 INFO L93 Difference]: Finished difference Result 536 states and 1539 transitions. [2022-01-28 14:49:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:49:38,568 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 [2022-01-28 14:49:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:38,571 INFO L225 Difference]: With dead ends: 536 [2022-01-28 14:49:38,571 INFO L226 Difference]: Without dead ends: 521 [2022-01-28 14:49:38,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 14:49:38,572 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 137 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:38,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 241 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:49:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-28 14:49:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 246. [2022-01-28 14:49:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.9918367346938775) internal successors, (733), 245 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 733 transitions. [2022-01-28 14:49:38,582 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 733 transitions. Word has length 20 [2022-01-28 14:49:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:38,582 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 733 transitions. [2022-01-28 14:49:38,582 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) [2022-01-28 14:49:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 733 transitions. [2022-01-28 14:49:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:38,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:38,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:38,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:38,803 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 [2022-01-28 14:49:38,804 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:38,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:38,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1276978829, now seen corresponding path program 5 times [2022-01-28 14:49:38,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:38,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046874419] [2022-01-28 14:49:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:38,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:39,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:39,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046874419] [2022-01-28 14:49:39,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046874419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:39,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732897148] [2022-01-28 14:49:39,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:49:39,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:39,016 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) [2022-01-28 14:49:39,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 14:49:39,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:39,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:39,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:39,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:39,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:39,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:39,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:39,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:39,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:39,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:39,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732897148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:39,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:39,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:39,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240799365] [2022-01-28 14:49:39,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:39,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:39,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:39,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:39,715 INFO L87 Difference]: Start difference. First operand 246 states and 733 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) [2022-01-28 14:49:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:40,490 INFO L93 Difference]: Finished difference Result 506 states and 1461 transitions. [2022-01-28 14:49:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:49:40,491 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 [2022-01-28 14:49:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:40,494 INFO L225 Difference]: With dead ends: 506 [2022-01-28 14:49:40,494 INFO L226 Difference]: Without dead ends: 476 [2022-01-28 14:49:40,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:49:40,495 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:40,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 254 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 824 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-01-28 14:49:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-28 14:49:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 250. [2022-01-28 14:49:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0080321285140563) internal successors, (749), 249 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 749 transitions. [2022-01-28 14:49:40,504 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 749 transitions. Word has length 20 [2022-01-28 14:49:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:40,504 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 749 transitions. [2022-01-28 14:49:40,505 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) [2022-01-28 14:49:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 749 transitions. [2022-01-28 14:49:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:40,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:40,505 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] [2022-01-28 14:49:40,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:40,723 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 [2022-01-28 14:49:40,723 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash 970633523, now seen corresponding path program 6 times [2022-01-28 14:49:40,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:40,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518355070] [2022-01-28 14:49:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:40,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:40,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518355070] [2022-01-28 14:49:40,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518355070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:40,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360680557] [2022-01-28 14:49:40,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:49:40,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:40,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:40,913 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) [2022-01-28 14:49:40,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 14:49:40,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:49:40,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:40,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:40,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:41,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:41,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:41,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:41,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:41,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:41,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:41,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:41,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:41,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:41,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:41,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:41,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360680557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:41,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:41,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:41,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541112950] [2022-01-28 14:49:41,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:41,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:41,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:41,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:41,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:41,548 INFO L87 Difference]: Start difference. First operand 250 states and 749 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) [2022-01-28 14:49:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:42,011 INFO L93 Difference]: Finished difference Result 475 states and 1384 transitions. [2022-01-28 14:49:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:49:42,012 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 [2022-01-28 14:49:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:42,014 INFO L225 Difference]: With dead ends: 475 [2022-01-28 14:49:42,014 INFO L226 Difference]: Without dead ends: 445 [2022-01-28 14:49:42,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:49:42,015 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:42,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 170 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 405 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-01-28 14:49:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-28 14:49:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 250. [2022-01-28 14:49:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0080321285140563) internal successors, (749), 249 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 749 transitions. [2022-01-28 14:49:42,023 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 749 transitions. Word has length 20 [2022-01-28 14:49:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:42,023 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 749 transitions. [2022-01-28 14:49:42,023 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) [2022-01-28 14:49:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 749 transitions. [2022-01-28 14:49:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:42,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:42,024 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] [2022-01-28 14:49:42,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:42,225 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 [2022-01-28 14:49:42,225 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:42,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:42,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1543838351, now seen corresponding path program 7 times [2022-01-28 14:49:42,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:42,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969142312] [2022-01-28 14:49:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:42,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:42,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:42,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969142312] [2022-01-28 14:49:42,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969142312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:42,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521700370] [2022-01-28 14:49:42,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:49:42,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:42,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:42,377 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) [2022-01-28 14:49:42,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 14:49:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:42,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:42,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:42,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:42,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:49:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:42,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:42,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:42,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:42,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:42,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:42,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:42,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:42,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521700370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:42,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:42,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-28 14:49:42,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421542341] [2022-01-28 14:49:42,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:42,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:49:42,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:49:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:49:42,836 INFO L87 Difference]: Start difference. First operand 250 states and 749 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) [2022-01-28 14:49:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:43,435 INFO L93 Difference]: Finished difference Result 420 states and 1237 transitions. [2022-01-28 14:49:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:49:43,435 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 [2022-01-28 14:49:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:43,437 INFO L225 Difference]: With dead ends: 420 [2022-01-28 14:49:43,438 INFO L226 Difference]: Without dead ends: 405 [2022-01-28 14:49:43,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:49:43,438 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:43,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 172 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:49:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-28 14:49:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 250. [2022-01-28 14:49:43,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.0080321285140563) internal successors, (749), 249 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 749 transitions. [2022-01-28 14:49:43,446 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 749 transitions. Word has length 20 [2022-01-28 14:49:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:43,446 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 749 transitions. [2022-01-28 14:49:43,447 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) [2022-01-28 14:49:43,447 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 749 transitions. [2022-01-28 14:49:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:43,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:43,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:43,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:43,670 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 [2022-01-28 14:49:43,670 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:43,671 INFO L85 PathProgramCache]: Analyzing trace with hash 332106461, now seen corresponding path program 8 times [2022-01-28 14:49:43,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:43,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104890593] [2022-01-28 14:49:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:43,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:43,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:43,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104890593] [2022-01-28 14:49:43,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104890593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:43,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651776014] [2022-01-28 14:49:43,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:49:43,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:43,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:43,811 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) [2022-01-28 14:49:43,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 14:49:43,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:43,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:43,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:43,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:43,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:49:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:43,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:44,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:44,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:44,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:44,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:44,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:44,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:44,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651776014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:44,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:44,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:49:44,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812949465] [2022-01-28 14:49:44,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:44,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:49:44,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:49:44,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:49:44,235 INFO L87 Difference]: Start difference. First operand 250 states and 749 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) [2022-01-28 14:49:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:44,821 INFO L93 Difference]: Finished difference Result 500 states and 1462 transitions. [2022-01-28 14:49:44,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:49:44,821 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 [2022-01-28 14:49:44,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:44,823 INFO L225 Difference]: With dead ends: 500 [2022-01-28 14:49:44,823 INFO L226 Difference]: Without dead ends: 485 [2022-01-28 14:49:44,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:49:44,824 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 120 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:44,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 208 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:49:44,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-28 14:49:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 254. [2022-01-28 14:49:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.007905138339921) internal successors, (761), 253 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 761 transitions. [2022-01-28 14:49:44,832 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 761 transitions. Word has length 20 [2022-01-28 14:49:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:44,832 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 761 transitions. [2022-01-28 14:49:44,832 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) [2022-01-28 14:49:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 761 transitions. [2022-01-28 14:49:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:44,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:44,833 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] [2022-01-28 14:49:44,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:45,056 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 [2022-01-28 14:49:45,056 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash 473066723, now seen corresponding path program 9 times [2022-01-28 14:49:45,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:45,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212371368] [2022-01-28 14:49:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:45,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:45,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:45,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212371368] [2022-01-28 14:49:45,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212371368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:45,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545380732] [2022-01-28 14:49:45,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:49:45,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:45,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:45,192 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) [2022-01-28 14:49:45,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 14:49:45,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:49:45,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:45,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:45,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:49:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:45,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:45,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:45,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:45,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:45,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:45,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:45,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:45,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545380732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:45,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:45,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:49:45,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955362653] [2022-01-28 14:49:45,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:45,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:49:45,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:45,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:49:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:49:45,641 INFO L87 Difference]: Start difference. First operand 254 states and 761 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) [2022-01-28 14:49:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:46,071 INFO L93 Difference]: Finished difference Result 455 states and 1324 transitions. [2022-01-28 14:49:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:49:46,071 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 [2022-01-28 14:49:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:46,073 INFO L225 Difference]: With dead ends: 455 [2022-01-28 14:49:46,073 INFO L226 Difference]: Without dead ends: 425 [2022-01-28 14:49:46,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:46,074 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:46,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 222 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:49:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-28 14:49:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 262. [2022-01-28 14:49:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0229885057471266) internal successors, (789), 261 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 789 transitions. [2022-01-28 14:49:46,082 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 789 transitions. Word has length 20 [2022-01-28 14:49:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:46,082 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 789 transitions. [2022-01-28 14:49:46,082 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) [2022-01-28 14:49:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 789 transitions. [2022-01-28 14:49:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:46,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:46,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:46,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:46,299 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 [2022-01-28 14:49:46,299 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1742606745, now seen corresponding path program 10 times [2022-01-28 14:49:46,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:46,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019869985] [2022-01-28 14:49:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:46,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:46,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:46,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019869985] [2022-01-28 14:49:46,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019869985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:46,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132217618] [2022-01-28 14:49:46,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:49:46,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:46,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:46,440 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) [2022-01-28 14:49:46,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 14:49:46,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:49:46,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:46,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:46,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:46,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:49:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:46,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:46,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:46,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:46,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:46,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:46,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:46,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:46,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132217618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:46,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:46,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:49:46,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184484258] [2022-01-28 14:49:46,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:46,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:49:46,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:49:46,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:49:46,903 INFO L87 Difference]: Start difference. First operand 262 states and 789 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) [2022-01-28 14:49:47,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:47,327 INFO L93 Difference]: Finished difference Result 473 states and 1367 transitions. [2022-01-28 14:49:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:49:47,327 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 [2022-01-28 14:49:47,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:47,329 INFO L225 Difference]: With dead ends: 473 [2022-01-28 14:49:47,329 INFO L226 Difference]: Without dead ends: 443 [2022-01-28 14:49:47,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:49:47,330 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:47,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 215 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:49:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-28 14:49:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 258. [2022-01-28 14:49:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 3.007782101167315) internal successors, (773), 257 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 773 transitions. [2022-01-28 14:49:47,340 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 773 transitions. Word has length 20 [2022-01-28 14:49:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:47,341 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 773 transitions. [2022-01-28 14:49:47,341 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) [2022-01-28 14:49:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 773 transitions. [2022-01-28 14:49:47,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:47,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:47,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:47,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:47,555 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 [2022-01-28 14:49:47,555 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:47,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:47,556 INFO L85 PathProgramCache]: Analyzing trace with hash 403564015, now seen corresponding path program 11 times [2022-01-28 14:49:47,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:47,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033816571] [2022-01-28 14:49:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:47,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:47,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033816571] [2022-01-28 14:49:47,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033816571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:47,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423083044] [2022-01-28 14:49:47,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:49:47,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:47,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:47,688 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) [2022-01-28 14:49:47,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 14:49:47,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:49:47,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:47,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:47,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:47,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:47,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:49:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:47,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:48,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:48,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:48,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:48,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:48,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:48,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:48,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423083044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:48,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:48,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:49:48,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754742613] [2022-01-28 14:49:48,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:48,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:49:48,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:49:48,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:49:48,153 INFO L87 Difference]: Start difference. First operand 258 states and 773 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) [2022-01-28 14:49:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:48,459 INFO L93 Difference]: Finished difference Result 417 states and 1217 transitions. [2022-01-28 14:49:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:49:48,459 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 [2022-01-28 14:49:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:48,461 INFO L225 Difference]: With dead ends: 417 [2022-01-28 14:49:48,461 INFO L226 Difference]: Without dead ends: 387 [2022-01-28 14:49:48,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:49:48,461 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:48,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 179 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:49:48,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-28 14:49:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 271. [2022-01-28 14:49:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 3.0037037037037035) internal successors, (811), 270 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 811 transitions. [2022-01-28 14:49:48,476 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 811 transitions. Word has length 20 [2022-01-28 14:49:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:48,476 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 811 transitions. [2022-01-28 14:49:48,476 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) [2022-01-28 14:49:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 811 transitions. [2022-01-28 14:49:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:48,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:48,477 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] [2022-01-28 14:49:48,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:48,691 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 [2022-01-28 14:49:48,691 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:48,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1526750339, now seen corresponding path program 12 times [2022-01-28 14:49:48,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:48,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445114819] [2022-01-28 14:49:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:48,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:48,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:48,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445114819] [2022-01-28 14:49:48,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445114819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:48,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447255859] [2022-01-28 14:49:48,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:49:48,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:48,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:48,853 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) [2022-01-28 14:49:48,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 14:49:48,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:49:48,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:48,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:49,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:49,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:49,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:49,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:49,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:49,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:49,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:49,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:49,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:49,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:49,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:49,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:49,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:49,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447255859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:49,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:49,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:49,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868884953] [2022-01-28 14:49:49,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:49,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:49,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:49,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:49,407 INFO L87 Difference]: Start difference. First operand 271 states and 811 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) [2022-01-28 14:49:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:49,560 INFO L93 Difference]: Finished difference Result 400 states and 1189 transitions. [2022-01-28 14:49:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:49:49,563 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 [2022-01-28 14:49:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:49,565 INFO L225 Difference]: With dead ends: 400 [2022-01-28 14:49:49,565 INFO L226 Difference]: Without dead ends: 385 [2022-01-28 14:49:49,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:49:49,566 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:49,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 181 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 272 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-01-28 14:49:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-28 14:49:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 280. [2022-01-28 14:49:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.007168458781362) internal successors, (839), 279 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 839 transitions. [2022-01-28 14:49:49,573 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 839 transitions. Word has length 20 [2022-01-28 14:49:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:49,573 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 839 transitions. [2022-01-28 14:49:49,573 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) [2022-01-28 14:49:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 839 transitions. [2022-01-28 14:49:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:49,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:49,574 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] [2022-01-28 14:49:49,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:49,795 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 [2022-01-28 14:49:49,796 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:49,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash 749866083, now seen corresponding path program 13 times [2022-01-28 14:49:49,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:49,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556214450] [2022-01-28 14:49:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:49,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:49,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:49,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556214450] [2022-01-28 14:49:49,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556214450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:49,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795521056] [2022-01-28 14:49:49,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:49:49,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:49,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:49,946 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) [2022-01-28 14:49:49,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 14:49:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:49,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:50,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:50,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:50,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:49:50,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:50,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:50,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:50,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:50,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:50,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:50,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:50,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:50,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:50,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795521056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:50,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:50,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:50,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12121300] [2022-01-28 14:49:50,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:50,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:50,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:50,507 INFO L87 Difference]: Start difference. First operand 280 states and 839 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) [2022-01-28 14:49:50,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:50,889 INFO L93 Difference]: Finished difference Result 482 states and 1403 transitions. [2022-01-28 14:49:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:49:50,889 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 [2022-01-28 14:49:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:50,891 INFO L225 Difference]: With dead ends: 482 [2022-01-28 14:49:50,891 INFO L226 Difference]: Without dead ends: 452 [2022-01-28 14:49:50,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:49:50,892 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:50,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 210 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:49:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-28 14:49:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 269. [2022-01-28 14:49:50,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0074626865671643) internal successors, (806), 268 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 806 transitions. [2022-01-28 14:49:50,898 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 806 transitions. Word has length 20 [2022-01-28 14:49:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:50,898 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 806 transitions. [2022-01-28 14:49:50,898 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) [2022-01-28 14:49:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 806 transitions. [2022-01-28 14:49:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:50,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:50,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:50,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:51,119 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 [2022-01-28 14:49:51,119 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash -470739545, now seen corresponding path program 14 times [2022-01-28 14:49:51,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:51,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779645028] [2022-01-28 14:49:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:51,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:51,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:51,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779645028] [2022-01-28 14:49:51,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779645028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:51,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438526751] [2022-01-28 14:49:51,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:49:51,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:51,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:51,301 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) [2022-01-28 14:49:51,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 14:49:51,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:51,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:51,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:51,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:51,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:51,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:51,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:51,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:51,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:51,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:51,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:51,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:51,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:51,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:51,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:51,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438526751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:51,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:51,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:51,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033576705] [2022-01-28 14:49:51,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:51,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:51,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:51,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:51,911 INFO L87 Difference]: Start difference. First operand 269 states and 806 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) [2022-01-28 14:49:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:52,305 INFO L93 Difference]: Finished difference Result 471 states and 1347 transitions. [2022-01-28 14:49:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:49:52,305 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 [2022-01-28 14:49:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:52,307 INFO L225 Difference]: With dead ends: 471 [2022-01-28 14:49:52,307 INFO L226 Difference]: Without dead ends: 441 [2022-01-28 14:49:52,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:49:52,308 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:52,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 246 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 633 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-01-28 14:49:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-01-28 14:49:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 265. [2022-01-28 14:49:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.992424242424242) internal successors, (790), 264 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 790 transitions. [2022-01-28 14:49:52,314 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 790 transitions. Word has length 20 [2022-01-28 14:49:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:52,315 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 790 transitions. [2022-01-28 14:49:52,315 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) [2022-01-28 14:49:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 790 transitions. [2022-01-28 14:49:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:52,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:52,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:52,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-28 14:49:52,527 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 [2022-01-28 14:49:52,527 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1753971719, now seen corresponding path program 15 times [2022-01-28 14:49:52,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:52,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668453221] [2022-01-28 14:49:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:52,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:52,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:52,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668453221] [2022-01-28 14:49:52,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668453221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613116450] [2022-01-28 14:49:52,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:49:52,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:52,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:52,682 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) [2022-01-28 14:49:52,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 14:49:52,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:49:52,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:52,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:52,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:52,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:52,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:49:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:52,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:52,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:53,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:53,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:53,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:53,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:53,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:53,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:53,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613116450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:53,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:53,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:53,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665232475] [2022-01-28 14:49:53,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:53,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:53,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:53,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:53,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:53,214 INFO L87 Difference]: Start difference. First operand 265 states and 790 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) [2022-01-28 14:49:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:53,637 INFO L93 Difference]: Finished difference Result 427 states and 1253 transitions. [2022-01-28 14:49:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:49:53,638 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 [2022-01-28 14:49:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:53,639 INFO L225 Difference]: With dead ends: 427 [2022-01-28 14:49:53,639 INFO L226 Difference]: Without dead ends: 412 [2022-01-28 14:49:53,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:49:53,640 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:53,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 221 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:49:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-28 14:49:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 268. [2022-01-28 14:49:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0037453183520597) internal successors, (802), 267 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 802 transitions. [2022-01-28 14:49:53,646 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 802 transitions. Word has length 20 [2022-01-28 14:49:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:53,646 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 802 transitions. [2022-01-28 14:49:53,646 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) [2022-01-28 14:49:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 802 transitions. [2022-01-28 14:49:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:53,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:53,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:53,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:53,871 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 [2022-01-28 14:49:53,871 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1944889661, now seen corresponding path program 16 times [2022-01-28 14:49:53,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:53,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394678688] [2022-01-28 14:49:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:53,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:54,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:54,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394678688] [2022-01-28 14:49:54,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394678688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:54,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284663497] [2022-01-28 14:49:54,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:49:54,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:54,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:54,036 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) [2022-01-28 14:49:54,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 14:49:54,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:49:54,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:54,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:54,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:54,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:54,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:54,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:54,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:54,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:54,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:54,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:54,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:54,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:54,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:54,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:54,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:54,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:54,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284663497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:54,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:54,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:54,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126982704] [2022-01-28 14:49:54,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:54,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:54,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:54,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:54,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:54,500 INFO L87 Difference]: Start difference. First operand 268 states and 802 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) [2022-01-28 14:49:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:54,867 INFO L93 Difference]: Finished difference Result 376 states and 1120 transitions. [2022-01-28 14:49:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:49:54,867 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 [2022-01-28 14:49:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:54,868 INFO L225 Difference]: With dead ends: 376 [2022-01-28 14:49:54,868 INFO L226 Difference]: Without dead ends: 361 [2022-01-28 14:49:54,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:49:54,869 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:54,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 221 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 712 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2022-01-28 14:49:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-28 14:49:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 268. [2022-01-28 14:49:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0037453183520597) internal successors, (802), 267 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 802 transitions. [2022-01-28 14:49:54,875 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 802 transitions. Word has length 20 [2022-01-28 14:49:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:54,875 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 802 transitions. [2022-01-28 14:49:54,875 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) [2022-01-28 14:49:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 802 transitions. [2022-01-28 14:49:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:54,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:54,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:54,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:55,099 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 [2022-01-28 14:49:55,099 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:55,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:55,100 INFO L85 PathProgramCache]: Analyzing trace with hash -430328473, now seen corresponding path program 17 times [2022-01-28 14:49:55,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:55,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141941984] [2022-01-28 14:49:55,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:55,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:55,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:55,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141941984] [2022-01-28 14:49:55,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141941984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:55,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835767665] [2022-01-28 14:49:55,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:49:55,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:55,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:55,260 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) [2022-01-28 14:49:55,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 14:49:55,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:49:55,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:55,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:55,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:55,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:55,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:55,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:55,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:55,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:55,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:55,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:55,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:49:55,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:55,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:55,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:55,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:49:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:55,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835767665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:55,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:55,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:49:55,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797653575] [2022-01-28 14:49:55,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:55,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:49:55,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:55,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:49:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:49:55,760 INFO L87 Difference]: Start difference. First operand 268 states and 802 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) [2022-01-28 14:49:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:56,048 INFO L93 Difference]: Finished difference Result 390 states and 1149 transitions. [2022-01-28 14:49:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:49:56,048 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 [2022-01-28 14:49:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:56,050 INFO L225 Difference]: With dead ends: 390 [2022-01-28 14:49:56,050 INFO L226 Difference]: Without dead ends: 375 [2022-01-28 14:49:56,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:49:56,050 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:56,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 154 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 482 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-01-28 14:49:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-01-28 14:49:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 264. [2022-01-28 14:49:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.988593155893536) internal successors, (786), 263 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 786 transitions. [2022-01-28 14:49:56,056 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 786 transitions. Word has length 20 [2022-01-28 14:49:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:56,057 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 786 transitions. [2022-01-28 14:49:56,057 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) [2022-01-28 14:49:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 786 transitions. [2022-01-28 14:49:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:56,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:56,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:56,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-28 14:49:56,278 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 [2022-01-28 14:49:56,278 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1438661017, now seen corresponding path program 18 times [2022-01-28 14:49:56,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:56,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473064197] [2022-01-28 14:49:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:56,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:56,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473064197] [2022-01-28 14:49:56,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473064197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365690326] [2022-01-28 14:49:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:49:56,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:56,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:56,410 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) [2022-01-28 14:49:56,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 14:49:56,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:49:56,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:56,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:56,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:56,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:56,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:56,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:56,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:56,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:56,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:56,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:56,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:56,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:49:56,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:56,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:49:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:56,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365690326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:56,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:56,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:49:56,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592604853] [2022-01-28 14:49:56,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:56,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:49:56,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:49:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:49:56,977 INFO L87 Difference]: Start difference. First operand 264 states and 786 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) [2022-01-28 14:49:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:57,145 INFO L93 Difference]: Finished difference Result 396 states and 1155 transitions. [2022-01-28 14:49:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:49:57,145 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 [2022-01-28 14:49:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:57,146 INFO L225 Difference]: With dead ends: 396 [2022-01-28 14:49:57,146 INFO L226 Difference]: Without dead ends: 366 [2022-01-28 14:49:57,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:49:57,147 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:57,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 165 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 384 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-01-28 14:49:57,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-28 14:49:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 272. [2022-01-28 14:49:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.003690036900369) internal successors, (814), 271 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 814 transitions. [2022-01-28 14:49:57,153 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 814 transitions. Word has length 20 [2022-01-28 14:49:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:57,154 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 814 transitions. [2022-01-28 14:49:57,154 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) [2022-01-28 14:49:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 814 transitions. [2022-01-28 14:49:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:57,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:57,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:57,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:57,371 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 [2022-01-28 14:49:57,371 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1934604139, now seen corresponding path program 19 times [2022-01-28 14:49:57,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:57,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771368189] [2022-01-28 14:49:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:57,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:57,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771368189] [2022-01-28 14:49:57,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771368189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738213139] [2022-01-28 14:49:57,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:49:57,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:57,537 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) [2022-01-28 14:49:57,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 14:49:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:57,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:57,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:57,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:57,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:57,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:57,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:57,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:57,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:57,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:58,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:58,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:49:58,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:58,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:49:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:58,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738213139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:58,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:58,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:58,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704659808] [2022-01-28 14:49:58,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:58,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:58,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:58,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:58,077 INFO L87 Difference]: Start difference. First operand 272 states and 814 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) [2022-01-28 14:49:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:58,402 INFO L93 Difference]: Finished difference Result 428 states and 1249 transitions. [2022-01-28 14:49:58,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:49:58,402 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 [2022-01-28 14:49:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:58,404 INFO L225 Difference]: With dead ends: 428 [2022-01-28 14:49:58,404 INFO L226 Difference]: Without dead ends: 413 [2022-01-28 14:49:58,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:49:58,404 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:58,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 233 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 580 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-28 14:49:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-28 14:49:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 272. [2022-01-28 14:49:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.003690036900369) internal successors, (814), 271 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 814 transitions. [2022-01-28 14:49:58,411 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 814 transitions. Word has length 20 [2022-01-28 14:49:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:58,411 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 814 transitions. [2022-01-28 14:49:58,411 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) [2022-01-28 14:49:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 814 transitions. [2022-01-28 14:49:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:58,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:58,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:49:58,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:58,627 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 [2022-01-28 14:49:58,627 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:58,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1606979541, now seen corresponding path program 20 times [2022-01-28 14:49:58,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:58,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14077571] [2022-01-28 14:49:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:58,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:49:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:58,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:49:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14077571] [2022-01-28 14:49:58,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14077571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:49:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352376703] [2022-01-28 14:49:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:49:58,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:49:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:49:58,783 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) [2022-01-28 14:49:58,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 14:49:58,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:49:58,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:49:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:49:58,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:49:58,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:49:59,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:59,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:59,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:49:59,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:59,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:49:59,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:59,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:49:59,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:59,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:49:59,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:49:59,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:49:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:49:59,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352376703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:49:59,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:49:59,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:49:59,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36479548] [2022-01-28 14:49:59,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:49:59,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:49:59,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:49:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:49:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:49:59,386 INFO L87 Difference]: Start difference. First operand 272 states and 814 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) [2022-01-28 14:49:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:49:59,743 INFO L93 Difference]: Finished difference Result 413 states and 1212 transitions. [2022-01-28 14:49:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:49:59,744 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 [2022-01-28 14:49:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:49:59,745 INFO L225 Difference]: With dead ends: 413 [2022-01-28 14:49:59,745 INFO L226 Difference]: Without dead ends: 406 [2022-01-28 14:49:59,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:49:59,746 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:49:59,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 285 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 700 Invalid, 0 Unknown, 232 Unchecked, 0.3s Time] [2022-01-28 14:49:59,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-28 14:49:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 272. [2022-01-28 14:49:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.003690036900369) internal successors, (814), 271 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:49:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 814 transitions. [2022-01-28 14:49:59,752 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 814 transitions. Word has length 20 [2022-01-28 14:49:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:49:59,752 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 814 transitions. [2022-01-28 14:49:59,752 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) [2022-01-28 14:49:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 814 transitions. [2022-01-28 14:49:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:49:59,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:49:59,753 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] [2022-01-28 14:49:59,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 14:49:59,953 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 [2022-01-28 14:49:59,954 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:49:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:49:59,954 INFO L85 PathProgramCache]: Analyzing trace with hash -608693927, now seen corresponding path program 21 times [2022-01-28 14:49:59,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:49:59,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18499460] [2022-01-28 14:49:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:49:59,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:49:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:00,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18499460] [2022-01-28 14:50:00,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18499460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:00,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031488865] [2022-01-28 14:50:00,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:00,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:00,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:00,127 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) [2022-01-28 14:50:00,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 14:50:00,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:50:00,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:00,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:00,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:00,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:00,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:00,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:00,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:00,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:00,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:00,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:00,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:00,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:00,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:00,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:00,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031488865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:00,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:00,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:00,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638852641] [2022-01-28 14:50:00,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:00,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:00,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:00,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:00,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:00,665 INFO L87 Difference]: Start difference. First operand 272 states and 814 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) [2022-01-28 14:50:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:00,994 INFO L93 Difference]: Finished difference Result 423 states and 1237 transitions. [2022-01-28 14:50:00,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:00,995 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 [2022-01-28 14:50:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:00,996 INFO L225 Difference]: With dead ends: 423 [2022-01-28 14:50:00,996 INFO L226 Difference]: Without dead ends: 393 [2022-01-28 14:50:00,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:50:00,997 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:00,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 213 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 572 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-28 14:50:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-28 14:50:01,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 268. [2022-01-28 14:50:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.9887640449438204) internal successors, (798), 267 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 798 transitions. [2022-01-28 14:50:01,003 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 798 transitions. Word has length 20 [2022-01-28 14:50:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:01,003 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 798 transitions. [2022-01-28 14:50:01,003 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) [2022-01-28 14:50:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 798 transitions. [2022-01-28 14:50:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:01,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:01,004 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] [2022-01-28 14:50:01,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:01,215 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 [2022-01-28 14:50:01,215 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:01,216 INFO L85 PathProgramCache]: Analyzing trace with hash 106457743, now seen corresponding path program 22 times [2022-01-28 14:50:01,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:01,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552377764] [2022-01-28 14:50:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:01,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:01,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:01,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552377764] [2022-01-28 14:50:01,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552377764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:01,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020997035] [2022-01-28 14:50:01,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:01,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:01,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:01,334 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) [2022-01-28 14:50:01,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 14:50:01,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:01,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:01,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:01,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:01,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:01,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:01,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:01,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:01,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:01,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:01,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:01,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:01,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:01,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:01,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:01,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:01,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:01,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020997035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:01,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:01,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:50:01,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901144797] [2022-01-28 14:50:01,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:01,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:50:01,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:01,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:50:01,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:50:01,809 INFO L87 Difference]: Start difference. First operand 268 states and 798 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) [2022-01-28 14:50:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:02,005 INFO L93 Difference]: Finished difference Result 379 states and 1111 transitions. [2022-01-28 14:50:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:50:02,007 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 [2022-01-28 14:50:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:02,009 INFO L225 Difference]: With dead ends: 379 [2022-01-28 14:50:02,009 INFO L226 Difference]: Without dead ends: 349 [2022-01-28 14:50:02,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:02,009 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:02,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 150 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 452 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-01-28 14:50:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-28 14:50:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 272. [2022-01-28 14:50:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.003690036900369) internal successors, (814), 271 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 814 transitions. [2022-01-28 14:50:02,015 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 814 transitions. Word has length 20 [2022-01-28 14:50:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:02,015 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 814 transitions. [2022-01-28 14:50:02,015 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) [2022-01-28 14:50:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 814 transitions. [2022-01-28 14:50:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:02,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:02,016 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] [2022-01-28 14:50:02,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:02,238 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 [2022-01-28 14:50:02,239 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash 693373345, now seen corresponding path program 23 times [2022-01-28 14:50:02,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:02,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63752220] [2022-01-28 14:50:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:02,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:02,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:02,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63752220] [2022-01-28 14:50:02,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63752220] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:02,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677967822] [2022-01-28 14:50:02,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:02,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:02,375 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) [2022-01-28 14:50:02,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 14:50:02,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:02,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:02,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:02,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:02,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:02,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:02,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:02,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:02,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:02,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:02,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:02,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:02,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:02,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:02,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:02,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677967822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:02,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:02,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:02,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892784493] [2022-01-28 14:50:02,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:02,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:02,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:02,918 INFO L87 Difference]: Start difference. First operand 272 states and 814 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) [2022-01-28 14:50:03,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:03,268 INFO L93 Difference]: Finished difference Result 435 states and 1256 transitions. [2022-01-28 14:50:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:03,268 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 [2022-01-28 14:50:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:03,270 INFO L225 Difference]: With dead ends: 435 [2022-01-28 14:50:03,270 INFO L226 Difference]: Without dead ends: 405 [2022-01-28 14:50:03,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:03,270 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:03,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 256 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-28 14:50:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 264. [2022-01-28 14:50:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.988593155893536) internal successors, (786), 263 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 786 transitions. [2022-01-28 14:50:03,276 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 786 transitions. Word has length 20 [2022-01-28 14:50:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:03,276 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 786 transitions. [2022-01-28 14:50:03,276 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) [2022-01-28 14:50:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 786 transitions. [2022-01-28 14:50:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:03,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:03,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:03,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-28 14:50:03,491 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 [2022-01-28 14:50:03,491 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1692373105, now seen corresponding path program 24 times [2022-01-28 14:50:03,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:03,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492461518] [2022-01-28 14:50:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:03,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:03,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:03,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492461518] [2022-01-28 14:50:03,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492461518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:03,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325264054] [2022-01-28 14:50:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:03,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:03,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:03,646 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) [2022-01-28 14:50:03,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 14:50:03,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:50:03,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:03,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:03,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:03,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:03,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:03,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:03,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:03,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:03,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:04,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:04,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:04,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:04,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:04,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:04,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:04,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325264054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:04,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:04,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:04,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934980517] [2022-01-28 14:50:04,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:04,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:04,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:04,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:04,152 INFO L87 Difference]: Start difference. First operand 264 states and 786 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) [2022-01-28 14:50:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:04,472 INFO L93 Difference]: Finished difference Result 395 states and 1161 transitions. [2022-01-28 14:50:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:04,473 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 [2022-01-28 14:50:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:04,475 INFO L225 Difference]: With dead ends: 395 [2022-01-28 14:50:04,475 INFO L226 Difference]: Without dead ends: 380 [2022-01-28 14:50:04,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:04,475 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:04,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 209 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 625 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-01-28 14:50:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-28 14:50:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 272. [2022-01-28 14:50:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.003690036900369) internal successors, (814), 271 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 814 transitions. [2022-01-28 14:50:04,482 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 814 transitions. Word has length 20 [2022-01-28 14:50:04,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:04,482 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 814 transitions. [2022-01-28 14:50:04,482 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) [2022-01-28 14:50:04,482 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 814 transitions. [2022-01-28 14:50:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:04,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:04,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:04,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-28 14:50:04,691 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 [2022-01-28 14:50:04,691 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:04,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1825709935, now seen corresponding path program 25 times [2022-01-28 14:50:04,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:04,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139631948] [2022-01-28 14:50:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:04,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:04,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:04,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139631948] [2022-01-28 14:50:04,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139631948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773901035] [2022-01-28 14:50:04,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:04,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:04,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:04,839 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) [2022-01-28 14:50:04,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 14:50:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:04,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:04,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:04,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:05,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:05,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:05,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:05,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:05,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:05,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:05,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:05,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:05,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:05,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:05,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:05,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773901035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:05,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:05,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:05,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074088629] [2022-01-28 14:50:05,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:05,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:05,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:05,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:05,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:05,359 INFO L87 Difference]: Start difference. First operand 272 states and 814 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) [2022-01-28 14:50:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:05,687 INFO L93 Difference]: Finished difference Result 435 states and 1267 transitions. [2022-01-28 14:50:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:50:05,687 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 [2022-01-28 14:50:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:05,689 INFO L225 Difference]: With dead ends: 435 [2022-01-28 14:50:05,689 INFO L226 Difference]: Without dead ends: 420 [2022-01-28 14:50:05,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:05,689 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:05,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 222 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 620 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-01-28 14:50:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-28 14:50:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 270. [2022-01-28 14:50:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.0) internal successors, (807), 269 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 807 transitions. [2022-01-28 14:50:05,695 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 807 transitions. Word has length 20 [2022-01-28 14:50:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:05,695 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 807 transitions. [2022-01-28 14:50:05,695 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) [2022-01-28 14:50:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 807 transitions. [2022-01-28 14:50:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:05,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:05,696 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] [2022-01-28 14:50:05,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-28 14:50:05,903 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 [2022-01-28 14:50:05,903 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1096267189, now seen corresponding path program 26 times [2022-01-28 14:50:05,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:05,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150583412] [2022-01-28 14:50:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:05,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:06,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150583412] [2022-01-28 14:50:06,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150583412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835172850] [2022-01-28 14:50:06,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:06,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:06,076 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) [2022-01-28 14:50:06,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 14:50:06,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:06,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:06,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:06,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:06,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:06,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:06,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:06,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:06,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:06,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:06,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:06,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:06,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:06,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:06,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:06,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:06,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:06,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835172850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:06,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:06,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:06,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283555077] [2022-01-28 14:50:06,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:06,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:06,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:06,592 INFO L87 Difference]: Start difference. First operand 270 states and 807 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) [2022-01-28 14:50:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:06,928 INFO L93 Difference]: Finished difference Result 389 states and 1146 transitions. [2022-01-28 14:50:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:06,928 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 [2022-01-28 14:50:06,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:06,930 INFO L225 Difference]: With dead ends: 389 [2022-01-28 14:50:06,930 INFO L226 Difference]: Without dead ends: 374 [2022-01-28 14:50:06,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:06,930 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:06,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 187 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 550 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-01-28 14:50:06,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-28 14:50:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 268. [2022-01-28 14:50:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.9962546816479403) internal successors, (800), 267 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 800 transitions. [2022-01-28 14:50:06,935 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 800 transitions. Word has length 20 [2022-01-28 14:50:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:06,935 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 800 transitions. [2022-01-28 14:50:06,935 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) [2022-01-28 14:50:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 800 transitions. [2022-01-28 14:50:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:06,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:06,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:06,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-28 14:50:07,137 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 [2022-01-28 14:50:07,138 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash -570766549, now seen corresponding path program 27 times [2022-01-28 14:50:07,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:07,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465348173] [2022-01-28 14:50:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:07,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:07,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465348173] [2022-01-28 14:50:07,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465348173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786742477] [2022-01-28 14:50:07,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:07,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:07,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:07,308 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) [2022-01-28 14:50:07,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 14:50:07,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:50:07,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:07,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:07,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:07,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:07,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:07,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:07,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:07,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:07,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:07,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:07,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:07,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:07,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:07,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:07,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:07,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786742477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:07,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:07,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:07,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504210020] [2022-01-28 14:50:07,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:07,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:07,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:07,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:07,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:07,852 INFO L87 Difference]: Start difference. First operand 268 states and 800 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) [2022-01-28 14:50:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:08,076 INFO L93 Difference]: Finished difference Result 431 states and 1259 transitions. [2022-01-28 14:50:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:50:08,077 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 [2022-01-28 14:50:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:08,079 INFO L225 Difference]: With dead ends: 431 [2022-01-28 14:50:08,079 INFO L226 Difference]: Without dead ends: 416 [2022-01-28 14:50:08,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:50:08,080 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:08,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 243 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 390 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-28 14:50:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-28 14:50:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 276. [2022-01-28 14:50:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0109090909090908) internal successors, (828), 275 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 828 transitions. [2022-01-28 14:50:08,085 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 828 transitions. Word has length 20 [2022-01-28 14:50:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:08,086 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 828 transitions. [2022-01-28 14:50:08,086 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) [2022-01-28 14:50:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 828 transitions. [2022-01-28 14:50:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:08,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:08,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:08,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:08,299 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 [2022-01-28 14:50:08,299 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:08,300 INFO L85 PathProgramCache]: Analyzing trace with hash 418293999, now seen corresponding path program 28 times [2022-01-28 14:50:08,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:08,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83051221] [2022-01-28 14:50:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:08,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:08,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:08,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83051221] [2022-01-28 14:50:08,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83051221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:08,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261265379] [2022-01-28 14:50:08,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:08,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:08,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:08,458 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) [2022-01-28 14:50:08,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 14:50:08,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:08,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:08,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:08,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:08,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:08,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:08,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:08,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:08,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:08,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:08,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:08,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:08,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:08,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:08,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:08,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:08,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:08,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261265379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:08,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:08,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:08,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243398205] [2022-01-28 14:50:08,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:08,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:08,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:08,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:08,919 INFO L87 Difference]: Start difference. First operand 276 states and 828 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) [2022-01-28 14:50:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:09,286 INFO L93 Difference]: Finished difference Result 435 states and 1274 transitions. [2022-01-28 14:50:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:09,287 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 [2022-01-28 14:50:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:09,289 INFO L225 Difference]: With dead ends: 435 [2022-01-28 14:50:09,289 INFO L226 Difference]: Without dead ends: 420 [2022-01-28 14:50:09,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:09,290 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:09,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 234 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 700 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-01-28 14:50:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-28 14:50:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 275. [2022-01-28 14:50:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0036496350364965) internal successors, (823), 274 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 823 transitions. [2022-01-28 14:50:09,299 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 823 transitions. Word has length 20 [2022-01-28 14:50:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:09,299 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 823 transitions. [2022-01-28 14:50:09,299 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) [2022-01-28 14:50:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 823 transitions. [2022-01-28 14:50:09,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:09,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:09,300 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] [2022-01-28 14:50:09,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:09,523 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 [2022-01-28 14:50:09,523 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1588862951, now seen corresponding path program 29 times [2022-01-28 14:50:09,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:09,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976121527] [2022-01-28 14:50:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:09,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:09,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:09,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976121527] [2022-01-28 14:50:09,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976121527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:09,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948646991] [2022-01-28 14:50:09,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:09,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:09,700 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) [2022-01-28 14:50:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 14:50:09,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:50:09,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:09,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:09,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:09,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:09,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:09,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:09,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:09,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:09,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:10,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:10,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:10,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:10,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:10,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:10,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:10,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948646991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:10,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:10,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:10,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26466235] [2022-01-28 14:50:10,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:10,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:10,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:10,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:10,235 INFO L87 Difference]: Start difference. First operand 275 states and 823 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) [2022-01-28 14:50:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:10,465 INFO L93 Difference]: Finished difference Result 376 states and 1112 transitions. [2022-01-28 14:50:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:50:10,466 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 [2022-01-28 14:50:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:10,467 INFO L225 Difference]: With dead ends: 376 [2022-01-28 14:50:10,467 INFO L226 Difference]: Without dead ends: 361 [2022-01-28 14:50:10,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:10,468 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:10,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 139 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 434 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-01-28 14:50:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-28 14:50:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 278. [2022-01-28 14:50:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.0144404332129966) internal successors, (835), 277 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 835 transitions. [2022-01-28 14:50:10,473 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 835 transitions. Word has length 20 [2022-01-28 14:50:10,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:10,473 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 835 transitions. [2022-01-28 14:50:10,473 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) [2022-01-28 14:50:10,473 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 835 transitions. [2022-01-28 14:50:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:10,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:10,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:10,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-28 14:50:10,695 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 [2022-01-28 14:50:10,695 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:10,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1182297261, now seen corresponding path program 30 times [2022-01-28 14:50:10,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:10,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563231719] [2022-01-28 14:50:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:10,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:10,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:10,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563231719] [2022-01-28 14:50:10,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563231719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:10,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288195813] [2022-01-28 14:50:10,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:10,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:10,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:10,844 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) [2022-01-28 14:50:10,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 14:50:10,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:50:10,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:10,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:10,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:11,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:11,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:11,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:11,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:11,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:11,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:11,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:11,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:11,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:11,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:11,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:11,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288195813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:11,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:11,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:11,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720015046] [2022-01-28 14:50:11,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:11,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:11,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:11,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:11,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:11,359 INFO L87 Difference]: Start difference. First operand 278 states and 835 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) [2022-01-28 14:50:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:11,676 INFO L93 Difference]: Finished difference Result 395 states and 1161 transitions. [2022-01-28 14:50:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:11,676 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 [2022-01-28 14:50:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:11,677 INFO L225 Difference]: With dead ends: 395 [2022-01-28 14:50:11,677 INFO L226 Difference]: Without dead ends: 380 [2022-01-28 14:50:11,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:11,678 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:11,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 246 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 717 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-01-28 14:50:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-28 14:50:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 279. [2022-01-28 14:50:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0179856115107913) internal successors, (839), 278 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 839 transitions. [2022-01-28 14:50:11,683 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 839 transitions. Word has length 20 [2022-01-28 14:50:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:11,683 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 839 transitions. [2022-01-28 14:50:11,683 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) [2022-01-28 14:50:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 839 transitions. [2022-01-28 14:50:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:11,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:11,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:11,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:11,897 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 [2022-01-28 14:50:11,898 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:11,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:11,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1451172353, now seen corresponding path program 31 times [2022-01-28 14:50:11,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:11,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525363481] [2022-01-28 14:50:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:11,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:12,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525363481] [2022-01-28 14:50:12,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525363481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235391319] [2022-01-28 14:50:12,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:12,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:12,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:12,032 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) [2022-01-28 14:50:12,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 14:50:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:12,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:12,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:12,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:12,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:12,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:12,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:12,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:12,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:12,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:12,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:12,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:12,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:12,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:12,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:12,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235391319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:12,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:12,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:12,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341683480] [2022-01-28 14:50:12,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:12,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:12,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:12,579 INFO L87 Difference]: Start difference. First operand 279 states and 839 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) [2022-01-28 14:50:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:12,827 INFO L93 Difference]: Finished difference Result 449 states and 1288 transitions. [2022-01-28 14:50:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:12,828 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 [2022-01-28 14:50:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:12,830 INFO L225 Difference]: With dead ends: 449 [2022-01-28 14:50:12,830 INFO L226 Difference]: Without dead ends: 419 [2022-01-28 14:50:12,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:12,830 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:12,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 218 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 565 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-01-28 14:50:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-01-28 14:50:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 287. [2022-01-28 14:50:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.006993006993007) internal successors, (860), 286 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 860 transitions. [2022-01-28 14:50:12,840 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 860 transitions. Word has length 20 [2022-01-28 14:50:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:12,842 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 860 transitions. [2022-01-28 14:50:12,842 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) [2022-01-28 14:50:12,842 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 860 transitions. [2022-01-28 14:50:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:12,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:12,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:12,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:13,055 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 [2022-01-28 14:50:13,055 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 775790425, now seen corresponding path program 32 times [2022-01-28 14:50:13,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:13,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978229827] [2022-01-28 14:50:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:13,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:13,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:13,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978229827] [2022-01-28 14:50:13,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978229827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:13,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303047227] [2022-01-28 14:50:13,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:13,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:13,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:13,213 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) [2022-01-28 14:50:13,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 14:50:13,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:13,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:13,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:13,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:13,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:13,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:13,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:13,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:13,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:13,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:13,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:13,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:13,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:13,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:13,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:13,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303047227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:13,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:13,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:13,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940560951] [2022-01-28 14:50:13,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:13,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:13,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:13,771 INFO L87 Difference]: Start difference. First operand 287 states and 860 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) [2022-01-28 14:50:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:14,031 INFO L93 Difference]: Finished difference Result 410 states and 1186 transitions. [2022-01-28 14:50:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:14,031 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 [2022-01-28 14:50:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:14,033 INFO L225 Difference]: With dead ends: 410 [2022-01-28 14:50:14,033 INFO L226 Difference]: Without dead ends: 404 [2022-01-28 14:50:14,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:14,033 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:14,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 231 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 584 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-01-28 14:50:14,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-28 14:50:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 275. [2022-01-28 14:50:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0036496350364965) internal successors, (823), 274 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 823 transitions. [2022-01-28 14:50:14,039 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 823 transitions. Word has length 20 [2022-01-28 14:50:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:14,039 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 823 transitions. [2022-01-28 14:50:14,039 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) [2022-01-28 14:50:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 823 transitions. [2022-01-28 14:50:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:14,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:14,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:14,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:14,262 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 [2022-01-28 14:50:14,263 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:14,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1573806475, now seen corresponding path program 33 times [2022-01-28 14:50:14,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:14,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547649857] [2022-01-28 14:50:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:14,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:14,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:14,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547649857] [2022-01-28 14:50:14,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547649857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:14,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397321011] [2022-01-28 14:50:14,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:14,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:14,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:14,384 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) [2022-01-28 14:50:14,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 14:50:14,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:50:14,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:14,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:14,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:14,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:50:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:14,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:14,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:14,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:14,742 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:14,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:50:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:14,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397321011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:14,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:14,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:14,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096362262] [2022-01-28 14:50:14,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:14,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:14,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:14,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:14,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:14,748 INFO L87 Difference]: Start difference. First operand 275 states and 823 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) [2022-01-28 14:50:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:15,422 INFO L93 Difference]: Finished difference Result 681 states and 1988 transitions. [2022-01-28 14:50:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:50:15,423 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 [2022-01-28 14:50:15,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:15,425 INFO L225 Difference]: With dead ends: 681 [2022-01-28 14:50:15,426 INFO L226 Difference]: Without dead ends: 666 [2022-01-28 14:50:15,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 14:50:15,426 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 304 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:15,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 164 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:15,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-28 14:50:15,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 289. [2022-01-28 14:50:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9930555555555554) internal successors, (862), 288 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 862 transitions. [2022-01-28 14:50:15,438 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 862 transitions. Word has length 20 [2022-01-28 14:50:15,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:15,438 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 862 transitions. [2022-01-28 14:50:15,438 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) [2022-01-28 14:50:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 862 transitions. [2022-01-28 14:50:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:15,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:15,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:15,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:15,643 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 [2022-01-28 14:50:15,643 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:15,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1714766737, now seen corresponding path program 34 times [2022-01-28 14:50:15,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:15,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934114212] [2022-01-28 14:50:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:15,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:15,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:15,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934114212] [2022-01-28 14:50:15,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934114212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:15,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533327866] [2022-01-28 14:50:15,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:15,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:15,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:15,749 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) [2022-01-28 14:50:15,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 14:50:15,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:15,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:15,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:15,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:15,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:50:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:15,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:16,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:16,131 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:16,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:50:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:16,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533327866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:16,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:16,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:16,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416628344] [2022-01-28 14:50:16,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:16,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:16,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:16,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:16,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:16,137 INFO L87 Difference]: Start difference. First operand 289 states and 862 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) [2022-01-28 14:50:16,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:16,600 INFO L93 Difference]: Finished difference Result 589 states and 1726 transitions. [2022-01-28 14:50:16,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:50:16,600 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 20 [2022-01-28 14:50:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:16,602 INFO L225 Difference]: With dead ends: 589 [2022-01-28 14:50:16,602 INFO L226 Difference]: Without dead ends: 574 [2022-01-28 14:50:16,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:50:16,603 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 133 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:16,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 188 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-28 14:50:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 297. [2022-01-28 14:50:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.0067567567567566) internal successors, (890), 296 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 890 transitions. [2022-01-28 14:50:16,610 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 890 transitions. Word has length 20 [2022-01-28 14:50:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:16,610 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 890 transitions. [2022-01-28 14:50:16,610 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) [2022-01-28 14:50:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 890 transitions. [2022-01-28 14:50:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:16,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:16,611 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] [2022-01-28 14:50:16,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-28 14:50:16,823 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 [2022-01-28 14:50:16,823 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash -500906731, now seen corresponding path program 35 times [2022-01-28 14:50:16,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:16,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690990263] [2022-01-28 14:50:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:16,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:16,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:16,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690990263] [2022-01-28 14:50:16,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690990263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:16,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426593993] [2022-01-28 14:50:16,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:16,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:16,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:16,940 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) [2022-01-28 14:50:16,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 14:50:16,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:16,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:16,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:16,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:17,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:17,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:50:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:17,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:17,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:17,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:17,295 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:17,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:50:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:17,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426593993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:17,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:17,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:17,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561392312] [2022-01-28 14:50:17,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:17,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:17,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:17,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:17,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:17,301 INFO L87 Difference]: Start difference. First operand 297 states and 890 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) [2022-01-28 14:50:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:17,778 INFO L93 Difference]: Finished difference Result 601 states and 1756 transitions. [2022-01-28 14:50:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:50:17,778 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 20 [2022-01-28 14:50:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:17,779 INFO L225 Difference]: With dead ends: 601 [2022-01-28 14:50:17,780 INFO L226 Difference]: Without dead ends: 586 [2022-01-28 14:50:17,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:50:17,780 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:17,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 191 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-28 14:50:17,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 293. [2022-01-28 14:50:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.993150684931507) internal successors, (874), 292 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 874 transitions. [2022-01-28 14:50:17,787 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 874 transitions. Word has length 20 [2022-01-28 14:50:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:17,787 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 874 transitions. [2022-01-28 14:50:17,787 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) [2022-01-28 14:50:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 874 transitions. [2022-01-28 14:50:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:17,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:17,788 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] [2022-01-28 14:50:17,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-28 14:50:17,988 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 [2022-01-28 14:50:17,988 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1645264029, now seen corresponding path program 36 times [2022-01-28 14:50:17,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:17,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800238948] [2022-01-28 14:50:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:17,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:18,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:18,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800238948] [2022-01-28 14:50:18,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800238948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:18,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859878309] [2022-01-28 14:50:18,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:18,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:18,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:18,120 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) [2022-01-28 14:50:18,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-28 14:50:18,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:50:18,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:18,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:18,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:50:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:18,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:18,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:18,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:18,492 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:18,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:50:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:18,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859878309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:18,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:18,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:18,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28469260] [2022-01-28 14:50:18,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:18,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:18,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:18,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:18,498 INFO L87 Difference]: Start difference. First operand 293 states and 874 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) [2022-01-28 14:50:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:18,964 INFO L93 Difference]: Finished difference Result 556 states and 1627 transitions. [2022-01-28 14:50:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:18,964 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 20 [2022-01-28 14:50:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:18,966 INFO L225 Difference]: With dead ends: 556 [2022-01-28 14:50:18,966 INFO L226 Difference]: Without dead ends: 541 [2022-01-28 14:50:18,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:50:18,967 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:18,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 257 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-28 14:50:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 285. [2022-01-28 14:50:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.992957746478873) internal successors, (850), 284 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 850 transitions. [2022-01-28 14:50:18,976 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 850 transitions. Word has length 20 [2022-01-28 14:50:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:18,976 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 850 transitions. [2022-01-28 14:50:18,977 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) [2022-01-28 14:50:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 850 transitions. [2022-01-28 14:50:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:18,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:18,977 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] [2022-01-28 14:50:19,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:19,178 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 [2022-01-28 14:50:19,178 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:19,178 INFO L85 PathProgramCache]: Analyzing trace with hash 242725131, now seen corresponding path program 37 times [2022-01-28 14:50:19,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:19,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940566217] [2022-01-28 14:50:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:19,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:19,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940566217] [2022-01-28 14:50:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940566217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202996782] [2022-01-28 14:50:19,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:19,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:19,292 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) [2022-01-28 14:50:19,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-28 14:50:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:19,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:19,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:19,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:50:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:19,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:19,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:19,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:19,642 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:19,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:50:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:19,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202996782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:19,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:19,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:19,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536095678] [2022-01-28 14:50:19,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:19,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:19,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:19,648 INFO L87 Difference]: Start difference. First operand 285 states and 850 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) [2022-01-28 14:50:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:20,156 INFO L93 Difference]: Finished difference Result 626 states and 1836 transitions. [2022-01-28 14:50:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:50:20,156 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 20 [2022-01-28 14:50:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:20,158 INFO L225 Difference]: With dead ends: 626 [2022-01-28 14:50:20,158 INFO L226 Difference]: Without dead ends: 611 [2022-01-28 14:50:20,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:50:20,158 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:20,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 252 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-01-28 14:50:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 300. [2022-01-28 14:50:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.0066889632107023) internal successors, (899), 299 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) [2022-01-28 14:50:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 899 transitions. [2022-01-28 14:50:20,163 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 899 transitions. Word has length 20 [2022-01-28 14:50:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:20,164 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 899 transitions. [2022-01-28 14:50:20,164 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) [2022-01-28 14:50:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 899 transitions. [2022-01-28 14:50:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:20,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:20,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:20,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-28 14:50:20,365 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 [2022-01-28 14:50:20,365 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1972948337, now seen corresponding path program 38 times [2022-01-28 14:50:20,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:20,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105311324] [2022-01-28 14:50:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:20,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:20,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:20,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105311324] [2022-01-28 14:50:20,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105311324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:20,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410309192] [2022-01-28 14:50:20,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:20,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:20,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:20,475 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) [2022-01-28 14:50:20,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-28 14:50:20,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:20,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:20,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:20,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:20,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:50:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:20,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:20,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:20,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:20,818 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:20,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:50:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:20,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410309192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:20,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:20,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:20,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123962505] [2022-01-28 14:50:20,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:20,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:20,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:20,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:20,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:20,827 INFO L87 Difference]: Start difference. First operand 300 states and 899 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) [2022-01-28 14:50:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:21,342 INFO L93 Difference]: Finished difference Result 638 states and 1866 transitions. [2022-01-28 14:50:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:50:21,342 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 20 [2022-01-28 14:50:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:21,343 INFO L225 Difference]: With dead ends: 638 [2022-01-28 14:50:21,344 INFO L226 Difference]: Without dead ends: 623 [2022-01-28 14:50:21,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:50:21,345 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:21,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 207 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-28 14:50:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 296. [2022-01-28 14:50:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.993220338983051) internal successors, (883), 295 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 883 transitions. [2022-01-28 14:50:21,352 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 883 transitions. Word has length 20 [2022-01-28 14:50:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:21,352 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 883 transitions. [2022-01-28 14:50:21,352 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) [2022-01-28 14:50:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 883 transitions. [2022-01-28 14:50:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:21,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:21,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:21,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-28 14:50:21,555 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 [2022-01-28 14:50:21,555 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 173222423, now seen corresponding path program 39 times [2022-01-28 14:50:21,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:21,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928393183] [2022-01-28 14:50:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:21,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:21,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:21,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928393183] [2022-01-28 14:50:21,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928393183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:21,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028962537] [2022-01-28 14:50:21,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:21,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:21,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:21,675 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) [2022-01-28 14:50:21,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-28 14:50:21,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:50:21,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:21,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:21,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:50:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:21,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:21,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:21,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:22,045 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:22,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:50:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:22,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028962537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:22,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:22,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:22,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904981551] [2022-01-28 14:50:22,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:22,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:22,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:22,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:22,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:22,052 INFO L87 Difference]: Start difference. First operand 296 states and 883 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) [2022-01-28 14:50:22,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:22,464 INFO L93 Difference]: Finished difference Result 582 states and 1706 transitions. [2022-01-28 14:50:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:22,465 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 20 [2022-01-28 14:50:22,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:22,466 INFO L225 Difference]: With dead ends: 582 [2022-01-28 14:50:22,466 INFO L226 Difference]: Without dead ends: 567 [2022-01-28 14:50:22,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:50:22,467 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:22,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 209 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-01-28 14:50:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 292. [2022-01-28 14:50:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.993127147766323) internal successors, (871), 291 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 871 transitions. [2022-01-28 14:50:22,473 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 871 transitions. Word has length 20 [2022-01-28 14:50:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:22,473 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 871 transitions. [2022-01-28 14:50:22,474 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) [2022-01-28 14:50:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 871 transitions. [2022-01-28 14:50:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:22,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:22,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:22,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-28 14:50:22,687 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 [2022-01-28 14:50:22,687 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:22,688 INFO L85 PathProgramCache]: Analyzing trace with hash -920869165, now seen corresponding path program 40 times [2022-01-28 14:50:22,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:22,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729545651] [2022-01-28 14:50:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:22,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:22,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:22,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729545651] [2022-01-28 14:50:22,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729545651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:22,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339543293] [2022-01-28 14:50:22,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:22,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:22,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:22,800 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) [2022-01-28 14:50:22,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-28 14:50:22,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:22,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:22,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:22,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:22,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:22,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:50:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:22,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:23,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:23,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:50:23,150 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:50:23,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:50:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:23,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339543293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:23,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:23,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:23,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6550026] [2022-01-28 14:50:23,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:23,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:23,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:23,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:23,156 INFO L87 Difference]: Start difference. First operand 292 states and 871 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) [2022-01-28 14:50:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:23,627 INFO L93 Difference]: Finished difference Result 690 states and 2023 transitions. [2022-01-28 14:50:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:23,628 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 20 [2022-01-28 14:50:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:23,629 INFO L225 Difference]: With dead ends: 690 [2022-01-28 14:50:23,629 INFO L226 Difference]: Without dead ends: 675 [2022-01-28 14:50:23,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:50:23,630 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 124 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:23,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 226 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:50:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-01-28 14:50:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 314. [2022-01-28 14:50:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.990415335463259) internal successors, (936), 313 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 936 transitions. [2022-01-28 14:50:23,635 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 936 transitions. Word has length 20 [2022-01-28 14:50:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:23,636 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 936 transitions. [2022-01-28 14:50:23,636 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) [2022-01-28 14:50:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 936 transitions. [2022-01-28 14:50:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:23,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:23,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:23,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-28 14:50:23,837 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 [2022-01-28 14:50:23,837 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2007222891, now seen corresponding path program 41 times [2022-01-28 14:50:23,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:23,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21250021] [2022-01-28 14:50:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:23,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:23,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:23,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21250021] [2022-01-28 14:50:23,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21250021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:23,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650136271] [2022-01-28 14:50:23,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:23,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:23,996 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) [2022-01-28 14:50:23,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-28 14:50:24,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:24,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:24,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:24,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:24,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:24,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:24,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:24,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:24,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:24,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:24,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:24,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:24,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:50:24,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:24,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:24,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:24,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:24,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650136271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:24,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:24,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:24,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627991738] [2022-01-28 14:50:24,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:24,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:24,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:24,526 INFO L87 Difference]: Start difference. First operand 314 states and 936 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) [2022-01-28 14:50:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:25,058 INFO L93 Difference]: Finished difference Result 576 states and 1682 transitions. [2022-01-28 14:50:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:50:25,059 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 [2022-01-28 14:50:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:25,060 INFO L225 Difference]: With dead ends: 576 [2022-01-28 14:50:25,060 INFO L226 Difference]: Without dead ends: 546 [2022-01-28 14:50:25,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:50:25,060 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:25,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 284 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 837 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-01-28 14:50:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-01-28 14:50:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 320. [2022-01-28 14:50:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9905956112852663) internal successors, (954), 319 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 954 transitions. [2022-01-28 14:50:25,073 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 954 transitions. Word has length 20 [2022-01-28 14:50:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:25,073 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 954 transitions. [2022-01-28 14:50:25,073 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) [2022-01-28 14:50:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 954 transitions. [2022-01-28 14:50:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:25,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:25,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:25,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:25,274 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 [2022-01-28 14:50:25,274 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:25,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1009159691, now seen corresponding path program 42 times [2022-01-28 14:50:25,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:25,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203646274] [2022-01-28 14:50:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:25,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:25,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:25,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203646274] [2022-01-28 14:50:25,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203646274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:25,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327530069] [2022-01-28 14:50:25,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:25,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:25,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:25,436 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) [2022-01-28 14:50:25,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-28 14:50:25,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:50:25,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:25,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:25,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:25,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:25,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:25,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:25,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:25,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:25,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:25,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:25,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:25,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:50:25,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:25,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:25,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:25,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:25,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327530069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:25,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:25,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:25,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223394806] [2022-01-28 14:50:25,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:25,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:25,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:25,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:25,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:25,920 INFO L87 Difference]: Start difference. First operand 320 states and 954 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) [2022-01-28 14:50:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:26,340 INFO L93 Difference]: Finished difference Result 538 states and 1575 transitions. [2022-01-28 14:50:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:26,340 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 [2022-01-28 14:50:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:26,341 INFO L225 Difference]: With dead ends: 538 [2022-01-28 14:50:26,341 INFO L226 Difference]: Without dead ends: 508 [2022-01-28 14:50:26,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:50:26,341 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:26,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 228 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 724 Invalid, 0 Unknown, 114 Unchecked, 0.3s Time] [2022-01-28 14:50:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-28 14:50:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 318. [2022-01-28 14:50:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.993690851735016) internal successors, (949), 317 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:26,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 949 transitions. [2022-01-28 14:50:26,348 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 949 transitions. Word has length 20 [2022-01-28 14:50:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:26,349 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 949 transitions. [2022-01-28 14:50:26,349 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) [2022-01-28 14:50:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 949 transitions. [2022-01-28 14:50:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:26,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:26,349 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] [2022-01-28 14:50:26,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:26,571 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 [2022-01-28 14:50:26,571 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:26,572 INFO L85 PathProgramCache]: Analyzing trace with hash -988330193, now seen corresponding path program 43 times [2022-01-28 14:50:26,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:26,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316440875] [2022-01-28 14:50:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:26,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:26,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:26,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316440875] [2022-01-28 14:50:26,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316440875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:26,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166449099] [2022-01-28 14:50:26,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:26,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:26,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:26,700 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) [2022-01-28 14:50:26,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-28 14:50:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:26,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:26,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:26,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:26,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:26,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:26,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:26,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:27,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:27,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:50:27,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:27,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:27,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:27,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:27,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166449099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:27,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:27,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:27,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787398648] [2022-01-28 14:50:27,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:27,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:27,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:27,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:27,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:27,236 INFO L87 Difference]: Start difference. First operand 318 states and 949 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) [2022-01-28 14:50:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:27,510 INFO L93 Difference]: Finished difference Result 537 states and 1564 transitions. [2022-01-28 14:50:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:50:27,510 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 [2022-01-28 14:50:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:27,511 INFO L225 Difference]: With dead ends: 537 [2022-01-28 14:50:27,511 INFO L226 Difference]: Without dead ends: 507 [2022-01-28 14:50:27,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:27,512 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:27,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 191 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 470 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-01-28 14:50:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-28 14:50:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 319. [2022-01-28 14:50:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.0) internal successors, (954), 318 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 954 transitions. [2022-01-28 14:50:27,517 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 954 transitions. Word has length 20 [2022-01-28 14:50:27,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:27,517 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 954 transitions. [2022-01-28 14:50:27,517 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) [2022-01-28 14:50:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 954 transitions. [2022-01-28 14:50:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:27,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:27,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:27,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:27,718 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 [2022-01-28 14:50:27,718 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:27,719 INFO L85 PathProgramCache]: Analyzing trace with hash -66628053, now seen corresponding path program 44 times [2022-01-28 14:50:27,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:27,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128298219] [2022-01-28 14:50:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:27,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:27,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:27,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128298219] [2022-01-28 14:50:27,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128298219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677754911] [2022-01-28 14:50:27,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:27,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:27,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:27,859 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) [2022-01-28 14:50:27,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-28 14:50:27,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:27,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:27,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:27,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:28,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:28,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:28,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:28,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:28,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:28,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:28,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:50:28,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:28,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:28,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:28,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:28,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677754911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:28,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:28,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:28,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769482998] [2022-01-28 14:50:28,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:28,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:28,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:28,411 INFO L87 Difference]: Start difference. First operand 319 states and 954 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) [2022-01-28 14:50:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:28,877 INFO L93 Difference]: Finished difference Result 586 states and 1697 transitions. [2022-01-28 14:50:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:50:28,877 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 [2022-01-28 14:50:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:28,879 INFO L225 Difference]: With dead ends: 586 [2022-01-28 14:50:28,879 INFO L226 Difference]: Without dead ends: 564 [2022-01-28 14:50:28,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:50:28,879 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:28,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 248 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 602 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-01-28 14:50:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-28 14:50:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 322. [2022-01-28 14:50:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.0062305295950154) internal successors, (965), 321 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 965 transitions. [2022-01-28 14:50:28,886 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 965 transitions. Word has length 20 [2022-01-28 14:50:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 965 transitions. [2022-01-28 14:50:28,886 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) [2022-01-28 14:50:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 965 transitions. [2022-01-28 14:50:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:28,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:28,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:28,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:29,087 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 [2022-01-28 14:50:29,087 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:29,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1259282159, now seen corresponding path program 45 times [2022-01-28 14:50:29,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:29,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558048022] [2022-01-28 14:50:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:29,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:29,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:29,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558048022] [2022-01-28 14:50:29,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558048022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:29,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265138908] [2022-01-28 14:50:29,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:29,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:29,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:29,260 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) [2022-01-28 14:50:29,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-28 14:50:29,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:50:29,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:50:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:29,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:29,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:29,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:29,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:29,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:29,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:29,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:29,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:29,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:50:29,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:29,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:29,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:29,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265138908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:29,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:29,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:29,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750164520] [2022-01-28 14:50:29,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:29,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:29,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:29,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:29,989 INFO L87 Difference]: Start difference. First operand 322 states and 965 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) [2022-01-28 14:50:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:30,753 INFO L93 Difference]: Finished difference Result 682 states and 1990 transitions. [2022-01-28 14:50:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 14:50:30,753 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 [2022-01-28 14:50:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:30,754 INFO L225 Difference]: With dead ends: 682 [2022-01-28 14:50:30,754 INFO L226 Difference]: Without dead ends: 652 [2022-01-28 14:50:30,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:50:30,755 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 82 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:30,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 309 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 851 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-01-28 14:50:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-28 14:50:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 333. [2022-01-28 14:50:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0542168674698793) internal successors, (1014), 332 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1014 transitions. [2022-01-28 14:50:30,761 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1014 transitions. Word has length 20 [2022-01-28 14:50:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:30,762 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 1014 transitions. [2022-01-28 14:50:30,762 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) [2022-01-28 14:50:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1014 transitions. [2022-01-28 14:50:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:30,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:30,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:30,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-28 14:50:30,963 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 [2022-01-28 14:50:30,963 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1236381071, now seen corresponding path program 46 times [2022-01-28 14:50:30,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:30,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411006299] [2022-01-28 14:50:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:30,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:31,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:31,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411006299] [2022-01-28 14:50:31,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411006299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:31,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598894406] [2022-01-28 14:50:31,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:31,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:31,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:31,128 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) [2022-01-28 14:50:31,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-28 14:50:31,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:31,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:31,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:31,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:31,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:31,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:31,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:31,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:31,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:31,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:31,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:31,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:31,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:50:31,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:31,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:31,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:31,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:31,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598894406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:31,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:31,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:31,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985362502] [2022-01-28 14:50:31,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:31,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:31,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:31,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:31,694 INFO L87 Difference]: Start difference. First operand 333 states and 1014 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) [2022-01-28 14:50:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:32,180 INFO L93 Difference]: Finished difference Result 580 states and 1703 transitions. [2022-01-28 14:50:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:50:32,181 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 [2022-01-28 14:50:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:32,182 INFO L225 Difference]: With dead ends: 580 [2022-01-28 14:50:32,182 INFO L226 Difference]: Without dead ends: 550 [2022-01-28 14:50:32,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:50:32,182 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:32,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 225 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 734 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-01-28 14:50:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-01-28 14:50:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 338. [2022-01-28 14:50:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.065281899109792) internal successors, (1033), 337 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) [2022-01-28 14:50:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1033 transitions. [2022-01-28 14:50:32,190 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1033 transitions. Word has length 20 [2022-01-28 14:50:32,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:32,190 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1033 transitions. [2022-01-28 14:50:32,190 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) [2022-01-28 14:50:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1033 transitions. [2022-01-28 14:50:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:32,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:32,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:32,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:32,391 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 [2022-01-28 14:50:32,391 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:32,391 INFO L85 PathProgramCache]: Analyzing trace with hash 459496815, now seen corresponding path program 47 times [2022-01-28 14:50:32,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:32,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508919775] [2022-01-28 14:50:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:32,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:32,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:32,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508919775] [2022-01-28 14:50:32,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508919775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:32,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460426371] [2022-01-28 14:50:32,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:32,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:32,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:32,509 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) [2022-01-28 14:50:32,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-28 14:50:32,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:32,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:32,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:32,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:32,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:32,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:32,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:32,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:32,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:32,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:32,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:50:32,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:32,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:32,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:32,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:33,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460426371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:33,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:33,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:33,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506886678] [2022-01-28 14:50:33,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:33,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:33,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:33,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:33,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:33,013 INFO L87 Difference]: Start difference. First operand 338 states and 1033 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) [2022-01-28 14:50:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:33,243 INFO L93 Difference]: Finished difference Result 542 states and 1623 transitions. [2022-01-28 14:50:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:33,244 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 [2022-01-28 14:50:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:33,245 INFO L225 Difference]: With dead ends: 542 [2022-01-28 14:50:33,245 INFO L226 Difference]: Without dead ends: 527 [2022-01-28 14:50:33,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:50:33,246 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:33,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 171 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 398 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-01-28 14:50:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-28 14:50:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 343. [2022-01-28 14:50:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.073099415204678) internal successors, (1051), 342 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1051 transitions. [2022-01-28 14:50:33,253 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1051 transitions. Word has length 20 [2022-01-28 14:50:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:33,253 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1051 transitions. [2022-01-28 14:50:33,253 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) [2022-01-28 14:50:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1051 transitions. [2022-01-28 14:50:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:33,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:33,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:33,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-28 14:50:33,454 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 [2022-01-28 14:50:33,454 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:33,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1832486987, now seen corresponding path program 48 times [2022-01-28 14:50:33,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:33,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734938637] [2022-01-28 14:50:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:33,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:33,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734938637] [2022-01-28 14:50:33,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734938637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428476566] [2022-01-28 14:50:33,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:33,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:33,632 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) [2022-01-28 14:50:33,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-28 14:50:33,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:50:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:33,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:33,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:33,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:33,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:33,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:33,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:33,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:33,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:34,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:34,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:50:34,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:34,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:34,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:34,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:34,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428476566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:34,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:34,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:34,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440802835] [2022-01-28 14:50:34,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:34,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:34,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:34,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:34,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:34,153 INFO L87 Difference]: Start difference. First operand 343 states and 1051 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) [2022-01-28 14:50:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:34,547 INFO L93 Difference]: Finished difference Result 582 states and 1723 transitions. [2022-01-28 14:50:34,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:34,548 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 [2022-01-28 14:50:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:34,549 INFO L225 Difference]: With dead ends: 582 [2022-01-28 14:50:34,549 INFO L226 Difference]: Without dead ends: 552 [2022-01-28 14:50:34,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:34,549 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:34,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 204 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 686 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-01-28 14:50:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-28 14:50:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 340. [2022-01-28 14:50:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0648967551622417) internal successors, (1039), 339 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:34,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1039 transitions. [2022-01-28 14:50:34,555 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1039 transitions. Word has length 20 [2022-01-28 14:50:34,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:34,555 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1039 transitions. [2022-01-28 14:50:34,555 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) [2022-01-28 14:50:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1039 transitions. [2022-01-28 14:50:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:34,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:34,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:34,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-28 14:50:34,756 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 [2022-01-28 14:50:34,756 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:34,756 INFO L85 PathProgramCache]: Analyzing trace with hash 921070369, now seen corresponding path program 49 times [2022-01-28 14:50:34,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:34,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322009909] [2022-01-28 14:50:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:34,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:34,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:34,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322009909] [2022-01-28 14:50:34,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322009909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:34,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652596969] [2022-01-28 14:50:34,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:34,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:34,889 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) [2022-01-28 14:50:34,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-28 14:50:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:34,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:34,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:35,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:35,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:35,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:35,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:35,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:35,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:35,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:35,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:35,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:35,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:35,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652596969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:35,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:35,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:35,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438021364] [2022-01-28 14:50:35,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:35,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:35,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:35,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:35,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:35,383 INFO L87 Difference]: Start difference. First operand 340 states and 1039 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) [2022-01-28 14:50:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:35,713 INFO L93 Difference]: Finished difference Result 557 states and 1652 transitions. [2022-01-28 14:50:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:50:35,713 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 [2022-01-28 14:50:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:35,714 INFO L225 Difference]: With dead ends: 557 [2022-01-28 14:50:35,714 INFO L226 Difference]: Without dead ends: 527 [2022-01-28 14:50:35,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:50:35,715 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:35,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 227 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 538 Invalid, 0 Unknown, 227 Unchecked, 0.2s Time] [2022-01-28 14:50:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-28 14:50:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 342. [2022-01-28 14:50:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0733137829912023) internal successors, (1048), 341 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) [2022-01-28 14:50:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1048 transitions. [2022-01-28 14:50:35,720 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1048 transitions. Word has length 20 [2022-01-28 14:50:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:35,720 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1048 transitions. [2022-01-28 14:50:35,720 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) [2022-01-28 14:50:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1048 transitions. [2022-01-28 14:50:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:35,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:35,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:35,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-01-28 14:50:35,941 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 [2022-01-28 14:50:35,942 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:35,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:35,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1842772509, now seen corresponding path program 50 times [2022-01-28 14:50:35,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:35,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137999605] [2022-01-28 14:50:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:35,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:36,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:36,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137999605] [2022-01-28 14:50:36,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137999605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:36,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806808942] [2022-01-28 14:50:36,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:36,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:36,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:36,120 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) [2022-01-28 14:50:36,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-28 14:50:36,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:36,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:36,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:36,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:36,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:36,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:36,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:36,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:36,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:36,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:36,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:36,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:36,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:36,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:36,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:36,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:36,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:36,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806808942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:36,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:36,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:36,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251359815] [2022-01-28 14:50:36,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:36,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:36,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:36,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:36,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:36,708 INFO L87 Difference]: Start difference. First operand 342 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) [2022-01-28 14:50:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:36,870 INFO L93 Difference]: Finished difference Result 507 states and 1515 transitions. [2022-01-28 14:50:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:36,870 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 [2022-01-28 14:50:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:36,871 INFO L225 Difference]: With dead ends: 507 [2022-01-28 14:50:36,871 INFO L226 Difference]: Without dead ends: 492 [2022-01-28 14:50:36,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:36,872 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:36,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 243 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 324 Invalid, 0 Unknown, 161 Unchecked, 0.1s Time] [2022-01-28 14:50:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-28 14:50:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 344. [2022-01-28 14:50:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0787172011661808) internal successors, (1056), 343 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1056 transitions. [2022-01-28 14:50:36,879 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1056 transitions. Word has length 20 [2022-01-28 14:50:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:36,879 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1056 transitions. [2022-01-28 14:50:36,879 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) [2022-01-28 14:50:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1056 transitions. [2022-01-28 14:50:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:36,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:36,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:36,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-28 14:50:37,102 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 [2022-01-28 14:50:37,103 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:37,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1089388893, now seen corresponding path program 51 times [2022-01-28 14:50:37,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:37,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886017449] [2022-01-28 14:50:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:37,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:37,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:37,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886017449] [2022-01-28 14:50:37,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886017449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:37,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678384750] [2022-01-28 14:50:37,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:37,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:37,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:37,264 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) [2022-01-28 14:50:37,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-28 14:50:37,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:50:37,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:37,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:37,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:37,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:37,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:37,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:37,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:37,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:37,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:37,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:37,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:37,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:37,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:37,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:37,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:37,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:37,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678384750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:37,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:37,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:37,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339232054] [2022-01-28 14:50:37,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:37,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:37,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:37,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:37,833 INFO L87 Difference]: Start difference. First operand 344 states and 1056 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) [2022-01-28 14:50:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:38,132 INFO L93 Difference]: Finished difference Result 538 states and 1604 transitions. [2022-01-28 14:50:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:50:38,133 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 [2022-01-28 14:50:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:38,134 INFO L225 Difference]: With dead ends: 538 [2022-01-28 14:50:38,134 INFO L226 Difference]: Without dead ends: 531 [2022-01-28 14:50:38,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:50:38,134 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:38,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 217 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 476 Invalid, 0 Unknown, 277 Unchecked, 0.2s Time] [2022-01-28 14:50:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-28 14:50:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 345. [2022-01-28 14:50:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.078488372093023) internal successors, (1059), 344 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1059 transitions. [2022-01-28 14:50:38,141 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1059 transitions. Word has length 20 [2022-01-28 14:50:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:38,142 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1059 transitions. [2022-01-28 14:50:38,142 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) [2022-01-28 14:50:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1059 transitions. [2022-01-28 14:50:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:38,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:38,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:38,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-28 14:50:38,355 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 [2022-01-28 14:50:38,355 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1126284575, now seen corresponding path program 52 times [2022-01-28 14:50:38,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:38,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548084037] [2022-01-28 14:50:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:38,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:38,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:38,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548084037] [2022-01-28 14:50:38,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548084037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:38,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459827119] [2022-01-28 14:50:38,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:38,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:38,477 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) [2022-01-28 14:50:38,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-28 14:50:38,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:38,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:38,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:38,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:38,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:38,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:38,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:38,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:38,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:38,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:38,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:38,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:38,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:38,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:38,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:38,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:38,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459827119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:38,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:38,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:50:38,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793559456] [2022-01-28 14:50:38,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:38,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:50:38,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:38,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:50:38,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:50:38,942 INFO L87 Difference]: Start difference. First operand 345 states and 1059 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) [2022-01-28 14:50:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:39,167 INFO L93 Difference]: Finished difference Result 506 states and 1515 transitions. [2022-01-28 14:50:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:39,168 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 [2022-01-28 14:50:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:39,169 INFO L225 Difference]: With dead ends: 506 [2022-01-28 14:50:39,169 INFO L226 Difference]: Without dead ends: 476 [2022-01-28 14:50:39,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:50:39,169 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:39,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 172 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 392 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-28 14:50:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-28 14:50:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 341. [2022-01-28 14:50:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0676470588235296) internal successors, (1043), 340 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1043 transitions. [2022-01-28 14:50:39,175 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1043 transitions. Word has length 20 [2022-01-28 14:50:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:39,175 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1043 transitions. [2022-01-28 14:50:39,175 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) [2022-01-28 14:50:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1043 transitions. [2022-01-28 14:50:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:39,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:39,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:39,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-28 14:50:39,376 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 [2022-01-28 14:50:39,376 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:39,377 INFO L85 PathProgramCache]: Analyzing trace with hash 927691021, now seen corresponding path program 53 times [2022-01-28 14:50:39,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:39,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527619391] [2022-01-28 14:50:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:39,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:39,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:39,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527619391] [2022-01-28 14:50:39,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527619391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:39,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329305466] [2022-01-28 14:50:39,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:39,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:39,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:39,485 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) [2022-01-28 14:50:39,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-28 14:50:39,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:39,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:39,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:39,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:39,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:39,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:39,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:39,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:39,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:39,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:39,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:39,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:39,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:39,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:39,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:39,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:39,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329305466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:39,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:39,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:39,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113487887] [2022-01-28 14:50:39,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:39,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:39,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:39,966 INFO L87 Difference]: Start difference. First operand 341 states and 1043 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) [2022-01-28 14:50:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:40,308 INFO L93 Difference]: Finished difference Result 494 states and 1485 transitions. [2022-01-28 14:50:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:40,308 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 [2022-01-28 14:50:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:40,309 INFO L225 Difference]: With dead ends: 494 [2022-01-28 14:50:40,309 INFO L226 Difference]: Without dead ends: 479 [2022-01-28 14:50:40,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:40,309 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:40,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 269 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 730 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-01-28 14:50:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-28 14:50:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 345. [2022-01-28 14:50:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.072674418604651) internal successors, (1057), 344 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1057 transitions. [2022-01-28 14:50:40,314 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1057 transitions. Word has length 20 [2022-01-28 14:50:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:40,314 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1057 transitions. [2022-01-28 14:50:40,314 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) [2022-01-28 14:50:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1057 transitions. [2022-01-28 14:50:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:40,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:40,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:40,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:40,515 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 [2022-01-28 14:50:40,516 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:40,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:40,516 INFO L85 PathProgramCache]: Analyzing trace with hash 174307405, now seen corresponding path program 54 times [2022-01-28 14:50:40,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:40,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544499047] [2022-01-28 14:50:40,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:40,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:40,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:40,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544499047] [2022-01-28 14:50:40,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544499047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:40,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447948313] [2022-01-28 14:50:40,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:40,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:40,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:40,629 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) [2022-01-28 14:50:40,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-28 14:50:40,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:50:40,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:40,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:40,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:40,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:40,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:40,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:40,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:41,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:41,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:41,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:41,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:41,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447948313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:41,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:41,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:41,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603921579] [2022-01-28 14:50:41,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:41,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:41,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:41,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:41,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:41,102 INFO L87 Difference]: Start difference. First operand 345 states and 1057 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) [2022-01-28 14:50:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:41,340 INFO L93 Difference]: Finished difference Result 488 states and 1468 transitions. [2022-01-28 14:50:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:41,340 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 [2022-01-28 14:50:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:41,342 INFO L225 Difference]: With dead ends: 488 [2022-01-28 14:50:41,342 INFO L226 Difference]: Without dead ends: 481 [2022-01-28 14:50:41,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:41,342 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:41,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 222 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 431 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-01-28 14:50:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-28 14:50:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 346. [2022-01-28 14:50:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.072463768115942) internal successors, (1060), 345 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) [2022-01-28 14:50:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1060 transitions. [2022-01-28 14:50:41,350 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1060 transitions. Word has length 20 [2022-01-28 14:50:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:41,350 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1060 transitions. [2022-01-28 14:50:41,350 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) [2022-01-28 14:50:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1060 transitions. [2022-01-28 14:50:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:41,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:41,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:41,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:41,574 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 [2022-01-28 14:50:41,574 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:41,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:41,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2041366063, now seen corresponding path program 55 times [2022-01-28 14:50:41,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:41,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919891611] [2022-01-28 14:50:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:41,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:41,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919891611] [2022-01-28 14:50:41,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919891611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879685659] [2022-01-28 14:50:41,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:41,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:41,683 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) [2022-01-28 14:50:41,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-28 14:50:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:41,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:41,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:41,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:41,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:41,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:41,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:41,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:41,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:42,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:42,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:42,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:42,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:42,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:42,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:42,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879685659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:42,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:42,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:50:42,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947551644] [2022-01-28 14:50:42,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:42,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:50:42,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:50:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:50:42,158 INFO L87 Difference]: Start difference. First operand 346 states and 1060 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) [2022-01-28 14:50:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:42,403 INFO L93 Difference]: Finished difference Result 486 states and 1465 transitions. [2022-01-28 14:50:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:42,403 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 [2022-01-28 14:50:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:42,405 INFO L225 Difference]: With dead ends: 486 [2022-01-28 14:50:42,405 INFO L226 Difference]: Without dead ends: 471 [2022-01-28 14:50:42,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:50:42,405 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:42,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 200 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 472 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-01-28 14:50:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-28 14:50:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 343. [2022-01-28 14:50:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0672514619883042) internal successors, (1049), 342 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) [2022-01-28 14:50:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1049 transitions. [2022-01-28 14:50:42,413 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1049 transitions. Word has length 20 [2022-01-28 14:50:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:42,413 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1049 transitions. [2022-01-28 14:50:42,413 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) [2022-01-28 14:50:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1049 transitions. [2022-01-28 14:50:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:42,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:42,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:42,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-28 14:50:42,627 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 [2022-01-28 14:50:42,627 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:42,628 INFO L85 PathProgramCache]: Analyzing trace with hash -341630197, now seen corresponding path program 56 times [2022-01-28 14:50:42,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:42,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403005142] [2022-01-28 14:50:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:42,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:42,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:42,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403005142] [2022-01-28 14:50:42,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403005142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:42,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033840604] [2022-01-28 14:50:42,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:42,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:42,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:42,752 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) [2022-01-28 14:50:42,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-28 14:50:42,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:42,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:42,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:42,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:43,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:43,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:43,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:43,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:43,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:43,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:43,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:43,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:43,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:43,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:43,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:43,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033840604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:43,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:43,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:50:43,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716864376] [2022-01-28 14:50:43,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:43,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:50:43,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:50:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:50:43,321 INFO L87 Difference]: Start difference. First operand 343 states and 1049 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) [2022-01-28 14:50:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:43,578 INFO L93 Difference]: Finished difference Result 496 states and 1481 transitions. [2022-01-28 14:50:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:43,579 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 [2022-01-28 14:50:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:43,580 INFO L225 Difference]: With dead ends: 496 [2022-01-28 14:50:43,580 INFO L226 Difference]: Without dead ends: 489 [2022-01-28 14:50:43,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:43,580 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:43,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 212 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 456 Invalid, 0 Unknown, 230 Unchecked, 0.2s Time] [2022-01-28 14:50:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-28 14:50:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 345. [2022-01-28 14:50:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.063953488372093) internal successors, (1054), 344 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1054 transitions. [2022-01-28 14:50:43,587 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1054 transitions. Word has length 20 [2022-01-28 14:50:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:43,587 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1054 transitions. [2022-01-28 14:50:43,587 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) [2022-01-28 14:50:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1054 transitions. [2022-01-28 14:50:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:43,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:43,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:43,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-28 14:50:43,788 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 [2022-01-28 14:50:43,788 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1737663631, now seen corresponding path program 57 times [2022-01-28 14:50:43,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:43,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139328994] [2022-01-28 14:50:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:43,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:43,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:43,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139328994] [2022-01-28 14:50:43,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139328994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:43,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058856463] [2022-01-28 14:50:43,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:43,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:43,898 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) [2022-01-28 14:50:43,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-28 14:50:43,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:50:43,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:43,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:43,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:44,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:44,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:44,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:44,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:44,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:44,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:44,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:44,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:44,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:44,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:44,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:44,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:44,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058856463] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:44,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:44,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:50:44,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949483046] [2022-01-28 14:50:44,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:44,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:50:44,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:50:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:50:44,443 INFO L87 Difference]: Start difference. First operand 345 states and 1054 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) [2022-01-28 14:50:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:44,614 INFO L93 Difference]: Finished difference Result 453 states and 1361 transitions. [2022-01-28 14:50:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:50:44,614 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 [2022-01-28 14:50:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:44,616 INFO L225 Difference]: With dead ends: 453 [2022-01-28 14:50:44,616 INFO L226 Difference]: Without dead ends: 446 [2022-01-28 14:50:44,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:50:44,616 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:44,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 179 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 355 Invalid, 0 Unknown, 139 Unchecked, 0.1s Time] [2022-01-28 14:50:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-01-28 14:50:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 344. [2022-01-28 14:50:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.064139941690962) internal successors, (1051), 343 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:44,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1051 transitions. [2022-01-28 14:50:44,621 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1051 transitions. Word has length 20 [2022-01-28 14:50:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:44,621 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1051 transitions. [2022-01-28 14:50:44,621 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) [2022-01-28 14:50:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1051 transitions. [2022-01-28 14:50:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:44,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:44,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:44,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:44,822 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 [2022-01-28 14:50:44,823 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash -411132905, now seen corresponding path program 58 times [2022-01-28 14:50:44,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:44,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936349530] [2022-01-28 14:50:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:44,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:44,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936349530] [2022-01-28 14:50:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936349530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117158890] [2022-01-28 14:50:44,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:44,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:44,942 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) [2022-01-28 14:50:44,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-28 14:50:44,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:44,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:44,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:44,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:45,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:45,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:45,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:45,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:45,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:45,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:45,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:45,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:45,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:45,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:45,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:45,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:45,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:45,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117158890] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:45,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:45,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:50:45,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896646213] [2022-01-28 14:50:45,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:45,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:50:45,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:45,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:50:45,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:50:45,423 INFO L87 Difference]: Start difference. First operand 344 states and 1051 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) [2022-01-28 14:50:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:45,641 INFO L93 Difference]: Finished difference Result 477 states and 1429 transitions. [2022-01-28 14:50:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:50:45,642 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 [2022-01-28 14:50:45,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:45,643 INFO L225 Difference]: With dead ends: 477 [2022-01-28 14:50:45,643 INFO L226 Difference]: Without dead ends: 447 [2022-01-28 14:50:45,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:50:45,643 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:45,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 151 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 507 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-01-28 14:50:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-28 14:50:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 348. [2022-01-28 14:50:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.07492795389049) internal successors, (1067), 347 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) [2022-01-28 14:50:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1067 transitions. [2022-01-28 14:50:45,650 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1067 transitions. Word has length 20 [2022-01-28 14:50:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:45,651 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1067 transitions. [2022-01-28 14:50:45,651 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) [2022-01-28 14:50:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1067 transitions. [2022-01-28 14:50:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:45,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:45,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:45,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-28 14:50:45,874 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 [2022-01-28 14:50:45,874 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:45,875 INFO L85 PathProgramCache]: Analyzing trace with hash 175782697, now seen corresponding path program 59 times [2022-01-28 14:50:45,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:45,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104288045] [2022-01-28 14:50:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:45,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:46,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104288045] [2022-01-28 14:50:46,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104288045] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633248652] [2022-01-28 14:50:46,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:46,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:46,020 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) [2022-01-28 14:50:46,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-28 14:50:46,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:46,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:46,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:46,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:46,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:46,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:46,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:46,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:46,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:46,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:46,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:46,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:46,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:46,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:46,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:46,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:46,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633248652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:46,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:46,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:46,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097731175] [2022-01-28 14:50:46,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:46,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:46,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:46,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:46,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:46,657 INFO L87 Difference]: Start difference. First operand 348 states and 1067 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) [2022-01-28 14:50:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:46,883 INFO L93 Difference]: Finished difference Result 536 states and 1576 transitions. [2022-01-28 14:50:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:46,883 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 [2022-01-28 14:50:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:46,885 INFO L225 Difference]: With dead ends: 536 [2022-01-28 14:50:46,885 INFO L226 Difference]: Without dead ends: 506 [2022-01-28 14:50:46,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:46,885 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:46,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 191 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 473 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2022-01-28 14:50:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-28 14:50:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 344. [2022-01-28 14:50:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.075801749271137) internal successors, (1055), 343 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1055 transitions. [2022-01-28 14:50:46,893 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1055 transitions. Word has length 20 [2022-01-28 14:50:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:46,893 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1055 transitions. [2022-01-28 14:50:46,893 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) [2022-01-28 14:50:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1055 transitions. [2022-01-28 14:50:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:46,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:46,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:46,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-28 14:50:47,115 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 [2022-01-28 14:50:47,115 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1725484703, now seen corresponding path program 60 times [2022-01-28 14:50:47,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:47,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676820762] [2022-01-28 14:50:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:47,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:47,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:47,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676820762] [2022-01-28 14:50:47,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676820762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:47,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018971033] [2022-01-28 14:50:47,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:47,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:47,255 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) [2022-01-28 14:50:47,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-28 14:50:47,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:50:47,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:47,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:47,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:47,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:47,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:47,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:47,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:47,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:47,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:47,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:47,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:47,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:47,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:47,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:47,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:47,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:47,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018971033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:47,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:47,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:47,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593843781] [2022-01-28 14:50:47,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:47,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:47,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:47,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:47,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:47,756 INFO L87 Difference]: Start difference. First operand 344 states and 1055 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) [2022-01-28 14:50:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:47,984 INFO L93 Difference]: Finished difference Result 494 states and 1480 transitions. [2022-01-28 14:50:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:47,984 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 [2022-01-28 14:50:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:47,985 INFO L225 Difference]: With dead ends: 494 [2022-01-28 14:50:47,985 INFO L226 Difference]: Without dead ends: 479 [2022-01-28 14:50:47,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:47,985 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:47,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 130 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 376 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-01-28 14:50:47,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-28 14:50:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 347. [2022-01-28 14:50:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0809248554913293) internal successors, (1066), 346 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1066 transitions. [2022-01-28 14:50:47,993 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1066 transitions. Word has length 20 [2022-01-28 14:50:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:47,993 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1066 transitions. [2022-01-28 14:50:47,993 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) [2022-01-28 14:50:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1066 transitions. [2022-01-28 14:50:47,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:47,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:47,994 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] [2022-01-28 14:50:48,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:48,207 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 [2022-01-28 14:50:48,207 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1994359795, now seen corresponding path program 61 times [2022-01-28 14:50:48,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:48,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812932195] [2022-01-28 14:50:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:48,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:48,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812932195] [2022-01-28 14:50:48,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812932195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:48,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108972669] [2022-01-28 14:50:48,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:48,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:48,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:48,363 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) [2022-01-28 14:50:48,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-28 14:50:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:48,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:48,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:48,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:48,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:48,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:48,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:48,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:48,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:48,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:48,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:49,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:49,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:49,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:49,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:49,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108972669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:49,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:49,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:49,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445441247] [2022-01-28 14:50:49,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:49,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:49,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:49,055 INFO L87 Difference]: Start difference. First operand 347 states and 1066 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) [2022-01-28 14:50:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:49,332 INFO L93 Difference]: Finished difference Result 535 states and 1566 transitions. [2022-01-28 14:50:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:49,333 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 [2022-01-28 14:50:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:49,333 INFO L225 Difference]: With dead ends: 535 [2022-01-28 14:50:49,334 INFO L226 Difference]: Without dead ends: 505 [2022-01-28 14:50:49,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:49,334 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:49,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 219 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 584 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-01-28 14:50:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-28 14:50:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 352. [2022-01-28 14:50:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0683760683760686) internal successors, (1077), 351 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1077 transitions. [2022-01-28 14:50:49,339 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1077 transitions. Word has length 20 [2022-01-28 14:50:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:49,339 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1077 transitions. [2022-01-28 14:50:49,340 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) [2022-01-28 14:50:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1077 transitions. [2022-01-28 14:50:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:49,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:49,341 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] [2022-01-28 14:50:49,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:49,555 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 [2022-01-28 14:50:49,555 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1851581893, now seen corresponding path program 62 times [2022-01-28 14:50:49,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688966249] [2022-01-28 14:50:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:49,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:49,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:49,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688966249] [2022-01-28 14:50:49,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688966249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:49,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313969753] [2022-01-28 14:50:49,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:49,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:49,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:49,706 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) [2022-01-28 14:50:49,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-28 14:50:49,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:49,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:49,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:49,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:49,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:50,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:50,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:50,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:50,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:50,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:50,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:50,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:50,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:50,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:50,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:50,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:50,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313969753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:50,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:50,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:50,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463127632] [2022-01-28 14:50:50,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:50,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:50,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:50,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:50,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:50,342 INFO L87 Difference]: Start difference. First operand 352 states and 1077 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) [2022-01-28 14:50:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:50,570 INFO L93 Difference]: Finished difference Result 510 states and 1503 transitions. [2022-01-28 14:50:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:50,571 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 [2022-01-28 14:50:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:50,572 INFO L225 Difference]: With dead ends: 510 [2022-01-28 14:50:50,572 INFO L226 Difference]: Without dead ends: 504 [2022-01-28 14:50:50,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:50:50,572 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:50,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 218 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 476 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-01-28 14:50:50,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-28 14:50:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 340. [2022-01-28 14:50:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0648967551622417) internal successors, (1039), 339 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1039 transitions. [2022-01-28 14:50:50,577 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1039 transitions. Word has length 20 [2022-01-28 14:50:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:50,577 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1039 transitions. [2022-01-28 14:50:50,577 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) [2022-01-28 14:50:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1039 transitions. [2022-01-28 14:50:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:50,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:50,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:50,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-28 14:50:50,778 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 [2022-01-28 14:50:50,778 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2085003543, now seen corresponding path program 63 times [2022-01-28 14:50:50,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:50,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441531502] [2022-01-28 14:50:50,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:50,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:50,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:50,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441531502] [2022-01-28 14:50:50,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441531502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:50,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701209852] [2022-01-28 14:50:50,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:50,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:50,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:50,921 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) [2022-01-28 14:50:50,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-28 14:50:50,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:50:50,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:50,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:51,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:51,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:51,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:51,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:51,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:51,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:51,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:51,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:51,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:51,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:51,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:51,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:51,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:51,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701209852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:51,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:51,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:51,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404138047] [2022-01-28 14:50:51,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:51,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:51,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:51,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:51,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:51,408 INFO L87 Difference]: Start difference. First operand 340 states and 1039 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) [2022-01-28 14:50:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:51,672 INFO L93 Difference]: Finished difference Result 507 states and 1520 transitions. [2022-01-28 14:50:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:50:51,673 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 [2022-01-28 14:50:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:51,674 INFO L225 Difference]: With dead ends: 507 [2022-01-28 14:50:51,674 INFO L226 Difference]: Without dead ends: 492 [2022-01-28 14:50:51,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:50:51,674 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:51,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 168 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 413 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-28 14:50:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-28 14:50:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 342. [2022-01-28 14:50:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0733137829912023) internal successors, (1048), 341 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) [2022-01-28 14:50:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1048 transitions. [2022-01-28 14:50:51,679 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1048 transitions. Word has length 20 [2022-01-28 14:50:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:51,680 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1048 transitions. [2022-01-28 14:50:51,680 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) [2022-01-28 14:50:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1048 transitions. [2022-01-28 14:50:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:51,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:51,680 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] [2022-01-28 14:50:51,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-28 14:50:51,881 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 [2022-01-28 14:50:51,881 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1308119287, now seen corresponding path program 64 times [2022-01-28 14:50:51,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:51,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649205241] [2022-01-28 14:50:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:51,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:52,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649205241] [2022-01-28 14:50:52,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649205241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934773591] [2022-01-28 14:50:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:52,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:52,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:52,054 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) [2022-01-28 14:50:52,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-28 14:50:52,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:52,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:52,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:52,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:52,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:52,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:52,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:52,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:52,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:52,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:52,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:52,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:52,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:52,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:52,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:52,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934773591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:52,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:52,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:52,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704554583] [2022-01-28 14:50:52,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:52,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:52,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:52,631 INFO L87 Difference]: Start difference. First operand 342 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) [2022-01-28 14:50:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:52,832 INFO L93 Difference]: Finished difference Result 529 states and 1585 transitions. [2022-01-28 14:50:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:52,832 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 [2022-01-28 14:50:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:52,833 INFO L225 Difference]: With dead ends: 529 [2022-01-28 14:50:52,833 INFO L226 Difference]: Without dead ends: 514 [2022-01-28 14:50:52,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:50:52,833 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:52,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 224 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 490 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-01-28 14:50:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-28 14:50:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 344. [2022-01-28 14:50:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0816326530612246) internal successors, (1057), 343 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1057 transitions. [2022-01-28 14:50:52,839 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1057 transitions. Word has length 20 [2022-01-28 14:50:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:52,839 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1057 transitions. [2022-01-28 14:50:52,839 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) [2022-01-28 14:50:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1057 transitions. [2022-01-28 14:50:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:52,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:52,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:52,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-28 14:50:53,040 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 [2022-01-28 14:50:53,040 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:53,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1613857837, now seen corresponding path program 65 times [2022-01-28 14:50:53,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:53,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239148953] [2022-01-28 14:50:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:53,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:53,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:53,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239148953] [2022-01-28 14:50:53,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239148953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:53,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126056213] [2022-01-28 14:50:53,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:50:53,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:53,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:53,184 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) [2022-01-28 14:50:53,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-28 14:50:53,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:50:53,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:53,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:53,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:53,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:53,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:53,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:53,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:53,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:53,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:53,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:53,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:53,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:53,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:53,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:53,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:53,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:53,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126056213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:53,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:53,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:53,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608711231] [2022-01-28 14:50:53,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:53,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:53,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:53,651 INFO L87 Difference]: Start difference. First operand 344 states and 1057 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) [2022-01-28 14:50:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:54,041 INFO L93 Difference]: Finished difference Result 507 states and 1522 transitions. [2022-01-28 14:50:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:50:54,041 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 [2022-01-28 14:50:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:54,042 INFO L225 Difference]: With dead ends: 507 [2022-01-28 14:50:54,042 INFO L226 Difference]: Without dead ends: 492 [2022-01-28 14:50:54,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:50:54,042 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:54,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 197 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 627 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-01-28 14:50:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-28 14:50:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 344. [2022-01-28 14:50:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0816326530612246) internal successors, (1057), 343 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1057 transitions. [2022-01-28 14:50:54,048 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1057 transitions. Word has length 20 [2022-01-28 14:50:54,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:54,048 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1057 transitions. [2022-01-28 14:50:54,048 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) [2022-01-28 14:50:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1057 transitions. [2022-01-28 14:50:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:54,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:54,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:54,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:54,249 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 [2022-01-28 14:50:54,249 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:54,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1088357197, now seen corresponding path program 66 times [2022-01-28 14:50:54,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:54,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720114814] [2022-01-28 14:50:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:54,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:54,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:54,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720114814] [2022-01-28 14:50:54,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720114814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:54,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091637221] [2022-01-28 14:50:54,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:50:54,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:54,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:54,390 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) [2022-01-28 14:50:54,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-28 14:50:54,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:50:54,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:54,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:54,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:54,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:54,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:54,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:54,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:54,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:54,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:54,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:54,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:54,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:54,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:54,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:54,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:54,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091637221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:54,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:54,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:54,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918127843] [2022-01-28 14:50:54,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:54,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:54,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:54,945 INFO L87 Difference]: Start difference. First operand 344 states and 1057 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) [2022-01-28 14:50:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:55,238 INFO L93 Difference]: Finished difference Result 540 states and 1612 transitions. [2022-01-28 14:50:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:50:55,238 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 [2022-01-28 14:50:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:55,239 INFO L225 Difference]: With dead ends: 540 [2022-01-28 14:50:55,239 INFO L226 Difference]: Without dead ends: 525 [2022-01-28 14:50:55,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:50:55,239 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:55,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 169 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 462 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-01-28 14:50:55,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-01-28 14:50:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 346. [2022-01-28 14:50:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.084057971014493) internal successors, (1064), 345 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) [2022-01-28 14:50:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1064 transitions. [2022-01-28 14:50:55,245 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1064 transitions. Word has length 20 [2022-01-28 14:50:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:55,245 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1064 transitions. [2022-01-28 14:50:55,245 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) [2022-01-28 14:50:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1064 transitions. [2022-01-28 14:50:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:55,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:55,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:55,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-28 14:50:55,446 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 [2022-01-28 14:50:55,446 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash -99296649, now seen corresponding path program 67 times [2022-01-28 14:50:55,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:55,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407308081] [2022-01-28 14:50:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:55,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:55,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:55,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407308081] [2022-01-28 14:50:55,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407308081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008610011] [2022-01-28 14:50:55,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:50:55,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:55,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:55,626 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) [2022-01-28 14:50:55,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-28 14:50:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:55,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:55,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:55,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:55,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:55,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:55,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:55,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:55,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:55,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:56,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:56,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:56,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:56,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:56,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:56,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:56,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008610011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:56,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:56,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:56,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593246633] [2022-01-28 14:50:56,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:56,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:56,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:56,146 INFO L87 Difference]: Start difference. First operand 346 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) [2022-01-28 14:50:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:56,357 INFO L93 Difference]: Finished difference Result 518 states and 1555 transitions. [2022-01-28 14:50:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:50:56,357 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 [2022-01-28 14:50:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:56,358 INFO L225 Difference]: With dead ends: 518 [2022-01-28 14:50:56,358 INFO L226 Difference]: Without dead ends: 503 [2022-01-28 14:50:56,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:50:56,359 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:56,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 195 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 434 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-28 14:50:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-28 14:50:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 345. [2022-01-28 14:50:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.078488372093023) internal successors, (1059), 344 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1059 transitions. [2022-01-28 14:50:56,363 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1059 transitions. Word has length 20 [2022-01-28 14:50:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:56,364 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1059 transitions. [2022-01-28 14:50:56,364 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) [2022-01-28 14:50:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1059 transitions. [2022-01-28 14:50:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:56,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:56,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:56,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-28 14:50:56,565 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 [2022-01-28 14:50:56,566 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2106453599, now seen corresponding path program 68 times [2022-01-28 14:50:56,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:56,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982758882] [2022-01-28 14:50:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:56,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:56,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:56,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982758882] [2022-01-28 14:50:56,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982758882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:56,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385525932] [2022-01-28 14:50:56,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:50:56,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:56,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:56,724 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) [2022-01-28 14:50:56,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-28 14:50:56,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:50:56,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:56,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:56,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:56,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:56,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:56,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:56,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:56,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:56,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:57,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:57,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:57,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:57,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:57,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:57,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:57,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:57,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385525932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:57,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:57,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:57,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23836945] [2022-01-28 14:50:57,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:57,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:57,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:57,287 INFO L87 Difference]: Start difference. First operand 345 states and 1059 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) [2022-01-28 14:50:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:57,541 INFO L93 Difference]: Finished difference Result 484 states and 1455 transitions. [2022-01-28 14:50:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:50:57,542 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 [2022-01-28 14:50:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:57,543 INFO L225 Difference]: With dead ends: 484 [2022-01-28 14:50:57,543 INFO L226 Difference]: Without dead ends: 469 [2022-01-28 14:50:57,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:57,543 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:57,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 170 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 455 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-01-28 14:50:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-28 14:50:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 346. [2022-01-28 14:50:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.084057971014493) internal successors, (1064), 345 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) [2022-01-28 14:50:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1064 transitions. [2022-01-28 14:50:57,549 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1064 transitions. Word has length 20 [2022-01-28 14:50:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:57,549 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1064 transitions. [2022-01-28 14:50:57,549 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) [2022-01-28 14:50:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1064 transitions. [2022-01-28 14:50:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:57,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:57,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:50:57,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-28 14:50:57,750 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 [2022-01-28 14:50:57,750 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:57,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:57,750 INFO L85 PathProgramCache]: Analyzing trace with hash 664706613, now seen corresponding path program 69 times [2022-01-28 14:50:57,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:57,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984530748] [2022-01-28 14:50:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:57,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:57,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:57,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984530748] [2022-01-28 14:50:57,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984530748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:57,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365336856] [2022-01-28 14:50:57,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:50:57,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:57,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:57,912 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) [2022-01-28 14:50:57,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-28 14:50:57,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:50:57,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:57,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:58,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:58,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:58,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:58,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:58,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:58,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:58,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:58,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:58,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:58,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:58,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:58,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:58,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:58,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365336856] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:58,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:58,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:58,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760706758] [2022-01-28 14:50:58,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:58,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:58,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:58,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:58,582 INFO L87 Difference]: Start difference. First operand 346 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) [2022-01-28 14:50:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:50:58,859 INFO L93 Difference]: Finished difference Result 496 states and 1489 transitions. [2022-01-28 14:50:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:50:58,860 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 [2022-01-28 14:50:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:50:58,861 INFO L225 Difference]: With dead ends: 496 [2022-01-28 14:50:58,861 INFO L226 Difference]: Without dead ends: 481 [2022-01-28 14:50:58,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:50:58,861 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:50:58,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 178 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 540 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-01-28 14:50:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-28 14:50:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 349. [2022-01-28 14:50:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.089080459770115) internal successors, (1075), 348 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:50:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1075 transitions. [2022-01-28 14:50:58,866 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1075 transitions. Word has length 20 [2022-01-28 14:50:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:50:58,866 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1075 transitions. [2022-01-28 14:50:58,866 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) [2022-01-28 14:50:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1075 transitions. [2022-01-28 14:50:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:50:58,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:50:58,866 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] [2022-01-28 14:50:58,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-28 14:50:59,067 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 [2022-01-28 14:50:59,067 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:50:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:50:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash 933581705, now seen corresponding path program 70 times [2022-01-28 14:50:59,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:50:59,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590897650] [2022-01-28 14:50:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:50:59,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:50:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:50:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:59,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:50:59,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590897650] [2022-01-28 14:50:59,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590897650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:50:59,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593137426] [2022-01-28 14:50:59,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:50:59,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:50:59,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:50:59,196 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) [2022-01-28 14:50:59,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-28 14:50:59,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:50:59,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:50:59,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:50:59,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:50:59,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:59,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:50:59,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:59,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:59,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:50:59,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:50:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:59,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:50:59,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:59,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:50:59,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:59,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:50:59,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:50:59,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:50:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:50:59,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593137426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:50:59,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:50:59,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:50:59,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422636571] [2022-01-28 14:50:59,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:50:59,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:50:59,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:50:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:50:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:50:59,797 INFO L87 Difference]: Start difference. First operand 349 states and 1075 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) [2022-01-28 14:51:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:00,074 INFO L93 Difference]: Finished difference Result 552 states and 1607 transitions. [2022-01-28 14:51:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:51:00,074 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 [2022-01-28 14:51:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:00,075 INFO L225 Difference]: With dead ends: 552 [2022-01-28 14:51:00,075 INFO L226 Difference]: Without dead ends: 515 [2022-01-28 14:51:00,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:00,075 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:00,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 243 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 601 Invalid, 0 Unknown, 264 Unchecked, 0.2s Time] [2022-01-28 14:51:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-28 14:51:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 345. [2022-01-28 14:51:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.078488372093023) internal successors, (1059), 344 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1059 transitions. [2022-01-28 14:51:00,081 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1059 transitions. Word has length 20 [2022-01-28 14:51:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:00,082 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1059 transitions. [2022-01-28 14:51:00,082 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) [2022-01-28 14:51:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1059 transitions. [2022-01-28 14:51:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:00,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:00,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:00,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-28 14:51:00,291 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 [2022-01-28 14:51:00,291 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:00,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1024071433, now seen corresponding path program 71 times [2022-01-28 14:51:00,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:00,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64775912] [2022-01-28 14:51:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:00,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:00,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64775912] [2022-01-28 14:51:00,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64775912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727701190] [2022-01-28 14:51:00,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:00,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:00,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:00,418 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) [2022-01-28 14:51:00,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-28 14:51:00,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:00,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:00,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:00,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:00,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:00,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:00,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:00,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:00,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:00,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:00,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:00,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:00,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:00,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:00,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:00,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:00,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:00,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727701190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:00,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:00,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:51:00,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718020279] [2022-01-28 14:51:00,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:00,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:51:00,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:51:00,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:51:00,924 INFO L87 Difference]: Start difference. First operand 345 states and 1059 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) [2022-01-28 14:51:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:01,181 INFO L93 Difference]: Finished difference Result 487 states and 1466 transitions. [2022-01-28 14:51:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:51:01,181 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 [2022-01-28 14:51:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:01,182 INFO L225 Difference]: With dead ends: 487 [2022-01-28 14:51:01,182 INFO L226 Difference]: Without dead ends: 472 [2022-01-28 14:51:01,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:51:01,182 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:01,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 172 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 513 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-01-28 14:51:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-28 14:51:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 347. [2022-01-28 14:51:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0751445086705202) internal successors, (1064), 346 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) [2022-01-28 14:51:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1064 transitions. [2022-01-28 14:51:01,187 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1064 transitions. Word has length 20 [2022-01-28 14:51:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:01,187 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1064 transitions. [2022-01-28 14:51:01,187 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) [2022-01-28 14:51:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1064 transitions. [2022-01-28 14:51:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:01,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:01,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:01,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-28 14:51:01,388 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 [2022-01-28 14:51:01,388 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:01,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2013131981, now seen corresponding path program 72 times [2022-01-28 14:51:01,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:01,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652902064] [2022-01-28 14:51:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:01,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:01,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:01,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652902064] [2022-01-28 14:51:01,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652902064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:01,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429065425] [2022-01-28 14:51:01,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:01,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:01,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:01,524 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) [2022-01-28 14:51:01,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-28 14:51:01,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:51:01,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:01,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:01,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:01,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:01,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:01,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:01,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:01,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:01,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:01,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:01,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:01,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:01,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:01,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:01,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:01,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:01,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429065425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:01,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:01,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:51:01,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514171020] [2022-01-28 14:51:01,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:01,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:51:01,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:01,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:51:01,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:51:01,984 INFO L87 Difference]: Start difference. First operand 347 states and 1064 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) [2022-01-28 14:51:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:02,232 INFO L93 Difference]: Finished difference Result 479 states and 1444 transitions. [2022-01-28 14:51:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:51:02,232 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 [2022-01-28 14:51:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:02,233 INFO L225 Difference]: With dead ends: 479 [2022-01-28 14:51:02,233 INFO L226 Difference]: Without dead ends: 464 [2022-01-28 14:51:02,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:02,233 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:02,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 156 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 505 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-01-28 14:51:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-28 14:51:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 347. [2022-01-28 14:51:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0751445086705202) internal successors, (1064), 346 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) [2022-01-28 14:51:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1064 transitions. [2022-01-28 14:51:02,237 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1064 transitions. Word has length 20 [2022-01-28 14:51:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:02,237 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1064 transitions. [2022-01-28 14:51:02,238 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) [2022-01-28 14:51:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1064 transitions. [2022-01-28 14:51:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:02,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:02,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:02,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:02,438 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 [2022-01-28 14:51:02,439 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:02,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1858694463, now seen corresponding path program 73 times [2022-01-28 14:51:02,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:02,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707193564] [2022-01-28 14:51:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:02,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:02,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:02,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707193564] [2022-01-28 14:51:02,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707193564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:02,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858345303] [2022-01-28 14:51:02,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:02,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:02,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:02,576 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) [2022-01-28 14:51:02,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-28 14:51:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:02,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:02,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:02,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:02,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:02,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:02,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:02,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:03,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:03,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:03,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:03,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:03,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:03,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:03,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858345303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:03,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:03,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:51:03,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548916161] [2022-01-28 14:51:03,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:03,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:51:03,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:51:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:51:03,136 INFO L87 Difference]: Start difference. First operand 347 states and 1064 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) [2022-01-28 14:51:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:03,374 INFO L93 Difference]: Finished difference Result 454 states and 1370 transitions. [2022-01-28 14:51:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:51:03,375 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 [2022-01-28 14:51:03,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:03,375 INFO L225 Difference]: With dead ends: 454 [2022-01-28 14:51:03,375 INFO L226 Difference]: Without dead ends: 439 [2022-01-28 14:51:03,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:03,376 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:03,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 181 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 517 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-01-28 14:51:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-28 14:51:03,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 349. [2022-01-28 14:51:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0775862068965516) internal successors, (1071), 348 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1071 transitions. [2022-01-28 14:51:03,381 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1071 transitions. Word has length 20 [2022-01-28 14:51:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:03,381 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1071 transitions. [2022-01-28 14:51:03,382 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) [2022-01-28 14:51:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1071 transitions. [2022-01-28 14:51:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:03,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:03,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:03,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-28 14:51:03,583 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 [2022-01-28 14:51:03,583 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:03,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:03,583 INFO L85 PathProgramCache]: Analyzing trace with hash 978255403, now seen corresponding path program 74 times [2022-01-28 14:51:03,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:03,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78793520] [2022-01-28 14:51:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:03,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:03,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:03,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78793520] [2022-01-28 14:51:03,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78793520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:03,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797970052] [2022-01-28 14:51:03,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:03,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:03,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:03,720 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) [2022-01-28 14:51:03,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-28 14:51:03,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:03,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:03,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:03,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:03,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:03,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:03,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:03,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:03,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:04,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:04,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:04,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:04,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:04,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:04,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:04,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:04,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797970052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:04,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:04,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:04,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510049559] [2022-01-28 14:51:04,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:04,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:04,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:04,282 INFO L87 Difference]: Start difference. First operand 349 states and 1071 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) [2022-01-28 14:51:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:04,515 INFO L93 Difference]: Finished difference Result 509 states and 1519 transitions. [2022-01-28 14:51:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:04,515 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 [2022-01-28 14:51:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:04,516 INFO L225 Difference]: With dead ends: 509 [2022-01-28 14:51:04,516 INFO L226 Difference]: Without dead ends: 494 [2022-01-28 14:51:04,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:04,516 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:04,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 223 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 475 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-01-28 14:51:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-28 14:51:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 353. [2022-01-28 14:51:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.071022727272727) internal successors, (1081), 352 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1081 transitions. [2022-01-28 14:51:04,522 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1081 transitions. Word has length 20 [2022-01-28 14:51:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:04,522 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1081 transitions. [2022-01-28 14:51:04,522 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) [2022-01-28 14:51:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1081 transitions. [2022-01-28 14:51:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:04,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:04,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:04,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-28 14:51:04,723 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 [2022-01-28 14:51:04,723 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1941497943, now seen corresponding path program 75 times [2022-01-28 14:51:04,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:04,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803968118] [2022-01-28 14:51:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:04,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:04,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:04,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803968118] [2022-01-28 14:51:04,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803968118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:04,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099948926] [2022-01-28 14:51:04,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:04,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:04,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:04,846 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) [2022-01-28 14:51:04,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-28 14:51:04,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:51:04,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:04,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:04,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:04,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:04,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:05,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:05,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:05,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:05,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:05,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:05,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:05,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:05,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:05,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:05,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:05,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:05,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099948926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:05,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:05,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:05,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68246745] [2022-01-28 14:51:05,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:05,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:05,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:05,421 INFO L87 Difference]: Start difference. First operand 353 states and 1081 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) [2022-01-28 14:51:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:05,705 INFO L93 Difference]: Finished difference Result 507 states and 1511 transitions. [2022-01-28 14:51:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:05,706 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 [2022-01-28 14:51:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:05,707 INFO L225 Difference]: With dead ends: 507 [2022-01-28 14:51:05,707 INFO L226 Difference]: Without dead ends: 500 [2022-01-28 14:51:05,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:05,707 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:05,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 225 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 632 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-01-28 14:51:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-28 14:51:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 355. [2022-01-28 14:51:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0649717514124295) internal successors, (1085), 354 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1085 transitions. [2022-01-28 14:51:05,712 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1085 transitions. Word has length 20 [2022-01-28 14:51:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:05,712 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1085 transitions. [2022-01-28 14:51:05,712 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) [2022-01-28 14:51:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1085 transitions. [2022-01-28 14:51:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:05,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:05,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:05,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-28 14:51:05,913 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 [2022-01-28 14:51:05,913 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:05,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1678087425, now seen corresponding path program 76 times [2022-01-28 14:51:05,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:05,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979771621] [2022-01-28 14:51:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:05,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:06,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:06,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979771621] [2022-01-28 14:51:06,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979771621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:06,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739058023] [2022-01-28 14:51:06,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:06,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:06,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:06,063 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) [2022-01-28 14:51:06,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-28 14:51:06,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:06,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:06,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:06,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:06,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:06,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:06,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:06,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:06,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:06,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:06,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:06,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:06,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:06,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:06,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:06,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:06,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739058023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:06,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:06,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:06,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119242486] [2022-01-28 14:51:06,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:06,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:06,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:06,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:06,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:06,719 INFO L87 Difference]: Start difference. First operand 355 states and 1085 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) [2022-01-28 14:51:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:06,944 INFO L93 Difference]: Finished difference Result 502 states and 1500 transitions. [2022-01-28 14:51:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:06,944 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 [2022-01-28 14:51:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:06,945 INFO L225 Difference]: With dead ends: 502 [2022-01-28 14:51:06,945 INFO L226 Difference]: Without dead ends: 499 [2022-01-28 14:51:06,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:06,945 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 37 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:06,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 173 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 471 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-01-28 14:51:06,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-28 14:51:06,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 344. [2022-01-28 14:51:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.075801749271137) internal successors, (1055), 343 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1055 transitions. [2022-01-28 14:51:06,950 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1055 transitions. Word has length 20 [2022-01-28 14:51:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:06,950 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 1055 transitions. [2022-01-28 14:51:06,950 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) [2022-01-28 14:51:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1055 transitions. [2022-01-28 14:51:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:06,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:06,951 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] [2022-01-28 14:51:06,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:07,153 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 [2022-01-28 14:51:07,153 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash -285800781, now seen corresponding path program 77 times [2022-01-28 14:51:07,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967159657] [2022-01-28 14:51:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:07,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:07,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:07,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967159657] [2022-01-28 14:51:07,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967159657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:07,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214874469] [2022-01-28 14:51:07,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:07,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:07,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:07,281 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) [2022-01-28 14:51:07,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-28 14:51:07,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:51:07,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:07,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:51:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:07,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:07,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:07,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:07,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:07,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:07,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:07,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:07,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:07,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:07,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:07,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214874469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:07,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:07,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:51:07,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221661761] [2022-01-28 14:51:07,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:07,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:51:07,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:51:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:07,832 INFO L87 Difference]: Start difference. First operand 344 states and 1055 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) [2022-01-28 14:51:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:08,614 INFO L93 Difference]: Finished difference Result 634 states and 1888 transitions. [2022-01-28 14:51:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:51:08,614 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 [2022-01-28 14:51:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:08,615 INFO L225 Difference]: With dead ends: 634 [2022-01-28 14:51:08,615 INFO L226 Difference]: Without dead ends: 604 [2022-01-28 14:51:08,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:51:08,616 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 69 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:08,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 311 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:51:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-01-28 14:51:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 363. [2022-01-28 14:51:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0939226519337018) internal successors, (1120), 362 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1120 transitions. [2022-01-28 14:51:08,625 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1120 transitions. Word has length 20 [2022-01-28 14:51:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:08,625 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1120 transitions. [2022-01-28 14:51:08,626 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) [2022-01-28 14:51:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1120 transitions. [2022-01-28 14:51:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:08,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:08,626 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] [2022-01-28 14:51:08,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:08,826 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 [2022-01-28 14:51:08,827 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1961811571, now seen corresponding path program 78 times [2022-01-28 14:51:08,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:08,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160251625] [2022-01-28 14:51:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:08,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:08,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:08,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160251625] [2022-01-28 14:51:08,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160251625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:08,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069227445] [2022-01-28 14:51:08,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:08,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:08,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:08,962 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) [2022-01-28 14:51:08,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-28 14:51:08,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:51:08,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:08,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:08,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:09,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:09,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:09,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:09,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:09,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:09,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:09,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:09,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:09,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:09,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069227445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:09,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:09,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:51:09,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170427239] [2022-01-28 14:51:09,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:09,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:51:09,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:51:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:09,386 INFO L87 Difference]: Start difference. First operand 363 states and 1120 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) [2022-01-28 14:51:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:09,868 INFO L93 Difference]: Finished difference Result 638 states and 1890 transitions. [2022-01-28 14:51:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:51:09,868 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 [2022-01-28 14:51:09,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:09,869 INFO L225 Difference]: With dead ends: 638 [2022-01-28 14:51:09,869 INFO L226 Difference]: Without dead ends: 608 [2022-01-28 14:51:09,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:51:09,869 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:09,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 241 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-28 14:51:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 363. [2022-01-28 14:51:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0939226519337018) internal successors, (1120), 362 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1120 transitions. [2022-01-28 14:51:09,875 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1120 transitions. Word has length 20 [2022-01-28 14:51:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:09,875 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1120 transitions. [2022-01-28 14:51:09,875 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) [2022-01-28 14:51:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1120 transitions. [2022-01-28 14:51:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:09,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:09,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:09,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-28 14:51:10,076 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 [2022-01-28 14:51:10,076 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1618004055, now seen corresponding path program 79 times [2022-01-28 14:51:10,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:10,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674663654] [2022-01-28 14:51:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:10,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:10,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:10,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674663654] [2022-01-28 14:51:10,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674663654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:10,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497827555] [2022-01-28 14:51:10,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:10,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:10,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:10,198 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) [2022-01-28 14:51:10,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-28 14:51:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:10,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:10,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:10,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:10,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:10,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:10,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:10,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:10,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:10,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:10,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:10,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497827555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:10,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:10,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:51:10,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941764942] [2022-01-28 14:51:10,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:10,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:51:10,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:10,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:51:10,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:51:10,601 INFO L87 Difference]: Start difference. First operand 363 states and 1120 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) [2022-01-28 14:51:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:10,851 INFO L93 Difference]: Finished difference Result 547 states and 1642 transitions. [2022-01-28 14:51:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:51:10,852 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 [2022-01-28 14:51:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:10,852 INFO L225 Difference]: With dead ends: 547 [2022-01-28 14:51:10,852 INFO L226 Difference]: Without dead ends: 517 [2022-01-28 14:51:10,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:10,853 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:10,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 130 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:51:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-28 14:51:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 363. [2022-01-28 14:51:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0939226519337018) internal successors, (1120), 362 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1120 transitions. [2022-01-28 14:51:10,858 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1120 transitions. Word has length 20 [2022-01-28 14:51:10,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:10,858 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1120 transitions. [2022-01-28 14:51:10,858 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) [2022-01-28 14:51:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1120 transitions. [2022-01-28 14:51:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:10,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:10,858 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] [2022-01-28 14:51:10,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-28 14:51:11,059 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 [2022-01-28 14:51:11,059 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:11,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1541229005, now seen corresponding path program 80 times [2022-01-28 14:51:11,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:11,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141043106] [2022-01-28 14:51:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:11,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:11,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141043106] [2022-01-28 14:51:11,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141043106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:11,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903155958] [2022-01-28 14:51:11,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:11,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:11,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:11,165 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) [2022-01-28 14:51:11,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-28 14:51:11,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:11,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:11,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:11,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:11,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:11,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:11,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:11,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:11,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:11,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:11,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:11,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:11,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903155958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:11,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:11,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:51:11,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141240994] [2022-01-28 14:51:11,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:11,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:51:11,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:11,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:51:11,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:51:11,511 INFO L87 Difference]: Start difference. First operand 363 states and 1120 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) [2022-01-28 14:51:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:12,005 INFO L93 Difference]: Finished difference Result 783 states and 2294 transitions. [2022-01-28 14:51:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:51:12,005 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 [2022-01-28 14:51:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:12,006 INFO L225 Difference]: With dead ends: 783 [2022-01-28 14:51:12,006 INFO L226 Difference]: Without dead ends: 753 [2022-01-28 14:51:12,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:51:12,006 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:12,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 238 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-28 14:51:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 363. [2022-01-28 14:51:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0939226519337018) internal successors, (1120), 362 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1120 transitions. [2022-01-28 14:51:12,014 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1120 transitions. Word has length 20 [2022-01-28 14:51:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:12,014 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1120 transitions. [2022-01-28 14:51:12,014 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) [2022-01-28 14:51:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1120 transitions. [2022-01-28 14:51:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:12,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:12,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:12,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-28 14:51:12,215 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 [2022-01-28 14:51:12,215 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1941217325, now seen corresponding path program 81 times [2022-01-28 14:51:12,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:12,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234943074] [2022-01-28 14:51:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:12,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:12,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234943074] [2022-01-28 14:51:12,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234943074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639993196] [2022-01-28 14:51:12,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:12,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:12,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:12,343 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) [2022-01-28 14:51:12,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-28 14:51:12,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:51:12,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:12,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:12,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:12,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:12,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:12,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:12,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:12,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:12,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:12,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639993196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:12,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:12,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:51:12,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564924937] [2022-01-28 14:51:12,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:12,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:51:12,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:51:12,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:12,760 INFO L87 Difference]: Start difference. First operand 363 states and 1120 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) [2022-01-28 14:51:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:13,161 INFO L93 Difference]: Finished difference Result 572 states and 1721 transitions. [2022-01-28 14:51:13,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:51:13,161 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 [2022-01-28 14:51:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:13,162 INFO L225 Difference]: With dead ends: 572 [2022-01-28 14:51:13,162 INFO L226 Difference]: Without dead ends: 557 [2022-01-28 14:51:13,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:51:13,163 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:13,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 203 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-28 14:51:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 373. [2022-01-28 14:51:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.096774193548387) internal successors, (1152), 372 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1152 transitions. [2022-01-28 14:51:13,168 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1152 transitions. Word has length 20 [2022-01-28 14:51:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:13,168 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1152 transitions. [2022-01-28 14:51:13,168 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) [2022-01-28 14:51:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1152 transitions. [2022-01-28 14:51:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:13,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:13,169 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] [2022-01-28 14:51:13,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:13,369 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 [2022-01-28 14:51:13,369 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1345111409, now seen corresponding path program 82 times [2022-01-28 14:51:13,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:13,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811200640] [2022-01-28 14:51:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:13,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:13,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811200640] [2022-01-28 14:51:13,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811200640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266357352] [2022-01-28 14:51:13,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:13,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:13,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:13,497 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) [2022-01-28 14:51:13,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-28 14:51:13,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:13,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:13,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:13,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:13,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:13,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:13,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:13,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:13,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:13,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:13,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:13,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266357352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:13,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:13,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:51:13,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792072777] [2022-01-28 14:51:13,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:13,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:51:13,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:51:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:13,910 INFO L87 Difference]: Start difference. First operand 373 states and 1152 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) [2022-01-28 14:51:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:14,335 INFO L93 Difference]: Finished difference Result 584 states and 1751 transitions. [2022-01-28 14:51:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:51:14,336 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 [2022-01-28 14:51:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:14,337 INFO L225 Difference]: With dead ends: 584 [2022-01-28 14:51:14,337 INFO L226 Difference]: Without dead ends: 569 [2022-01-28 14:51:14,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:51:14,338 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:14,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 195 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-28 14:51:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 372. [2022-01-28 14:51:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.091644204851752) internal successors, (1147), 371 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1147 transitions. [2022-01-28 14:51:14,345 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1147 transitions. Word has length 20 [2022-01-28 14:51:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:14,345 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1147 transitions. [2022-01-28 14:51:14,345 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) [2022-01-28 14:51:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1147 transitions. [2022-01-28 14:51:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:14,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:14,346 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] [2022-01-28 14:51:14,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-28 14:51:14,563 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 [2022-01-28 14:51:14,563 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1837707171, now seen corresponding path program 83 times [2022-01-28 14:51:14,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:14,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831754046] [2022-01-28 14:51:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:14,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:14,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831754046] [2022-01-28 14:51:14,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831754046] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858010192] [2022-01-28 14:51:14,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:14,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:14,684 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) [2022-01-28 14:51:14,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-28 14:51:14,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:51:14,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:14,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:51:14,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:14,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:14,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:14,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:15,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:15,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:15,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:15,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:15,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:15,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:15,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858010192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:15,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:15,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:51:15,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858259901] [2022-01-28 14:51:15,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:15,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:51:15,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:15,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:51:15,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:15,250 INFO L87 Difference]: Start difference. First operand 372 states and 1147 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) [2022-01-28 14:51:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:15,883 INFO L93 Difference]: Finished difference Result 618 states and 1850 transitions. [2022-01-28 14:51:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:51:15,883 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 [2022-01-28 14:51:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:15,884 INFO L225 Difference]: With dead ends: 618 [2022-01-28 14:51:15,884 INFO L226 Difference]: Without dead ends: 573 [2022-01-28 14:51:15,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:51:15,884 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:15,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 258 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:51:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-28 14:51:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 401. [2022-01-28 14:51:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.11) internal successors, (1244), 400 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1244 transitions. [2022-01-28 14:51:15,890 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1244 transitions. Word has length 20 [2022-01-28 14:51:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:15,890 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1244 transitions. [2022-01-28 14:51:15,890 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) [2022-01-28 14:51:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1244 transitions. [2022-01-28 14:51:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:15,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:15,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:15,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-28 14:51:16,091 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 [2022-01-28 14:51:16,092 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:16,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:16,092 INFO L85 PathProgramCache]: Analyzing trace with hash -352617845, now seen corresponding path program 84 times [2022-01-28 14:51:16,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:16,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901837472] [2022-01-28 14:51:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:16,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:16,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901837472] [2022-01-28 14:51:16,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901837472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781719236] [2022-01-28 14:51:16,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:16,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:16,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:16,220 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) [2022-01-28 14:51:16,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-28 14:51:16,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:51:16,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:16,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:16,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:16,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:16,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:16,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:16,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:16,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:16,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:16,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:16,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:16,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781719236] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:16,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:16,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:51:16,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5210265] [2022-01-28 14:51:16,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:16,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:51:16,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:16,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:51:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:51:16,615 INFO L87 Difference]: Start difference. First operand 401 states and 1244 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) [2022-01-28 14:51:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:17,039 INFO L93 Difference]: Finished difference Result 678 states and 2048 transitions. [2022-01-28 14:51:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:17,039 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 [2022-01-28 14:51:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:17,040 INFO L225 Difference]: With dead ends: 678 [2022-01-28 14:51:17,040 INFO L226 Difference]: Without dead ends: 663 [2022-01-28 14:51:17,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:51:17,041 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:17,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 199 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-28 14:51:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 401. [2022-01-28 14:51:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.11) internal successors, (1244), 400 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1244 transitions. [2022-01-28 14:51:17,047 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1244 transitions. Word has length 20 [2022-01-28 14:51:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:17,047 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1244 transitions. [2022-01-28 14:51:17,047 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) [2022-01-28 14:51:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1244 transitions. [2022-01-28 14:51:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:17,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:17,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:17,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-28 14:51:17,263 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 [2022-01-28 14:51:17,263 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:17,263 INFO L85 PathProgramCache]: Analyzing trace with hash 265545737, now seen corresponding path program 85 times [2022-01-28 14:51:17,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:17,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449018364] [2022-01-28 14:51:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:17,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:17,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:17,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449018364] [2022-01-28 14:51:17,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449018364] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:17,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430010819] [2022-01-28 14:51:17,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:17,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:17,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:17,380 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) [2022-01-28 14:51:17,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-28 14:51:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:17,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:17,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:17,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:17,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:17,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:17,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:17,732 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:17,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-01-28 14:51:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:17,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430010819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:17,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:17,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-28 14:51:17,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156452178] [2022-01-28 14:51:17,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:17,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:17,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:17,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:17,741 INFO L87 Difference]: Start difference. First operand 401 states and 1244 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) [2022-01-28 14:51:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:18,730 INFO L93 Difference]: Finished difference Result 903 states and 2692 transitions. [2022-01-28 14:51:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:51:18,731 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 [2022-01-28 14:51:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:18,732 INFO L225 Difference]: With dead ends: 903 [2022-01-28 14:51:18,732 INFO L226 Difference]: Without dead ends: 888 [2022-01-28 14:51:18,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=451, Invalid=1805, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 14:51:18,732 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 237 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:18,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 254 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:51:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-28 14:51:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 407. [2022-01-28 14:51:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1083743842364533) internal successors, (1262), 406 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) [2022-01-28 14:51:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1262 transitions. [2022-01-28 14:51:18,739 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1262 transitions. Word has length 20 [2022-01-28 14:51:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:18,739 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1262 transitions. [2022-01-28 14:51:18,739 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) [2022-01-28 14:51:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1262 transitions. [2022-01-28 14:51:18,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:18,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:18,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:18,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-01-28 14:51:18,940 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 [2022-01-28 14:51:18,940 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:18,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1677154455, now seen corresponding path program 86 times [2022-01-28 14:51:18,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:18,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425311330] [2022-01-28 14:51:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:18,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:19,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425311330] [2022-01-28 14:51:19,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425311330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953881472] [2022-01-28 14:51:19,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:19,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:19,056 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) [2022-01-28 14:51:19,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-28 14:51:19,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:19,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:19,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:19,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:19,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:19,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:19,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:19,381 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:19,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-01-28 14:51:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:19,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953881472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:19,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:19,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:19,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137020309] [2022-01-28 14:51:19,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:19,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:19,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:19,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:19,390 INFO L87 Difference]: Start difference. First operand 407 states and 1262 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) [2022-01-28 14:51:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:19,948 INFO L93 Difference]: Finished difference Result 808 states and 2417 transitions. [2022-01-28 14:51:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:51:19,948 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 [2022-01-28 14:51:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:19,950 INFO L225 Difference]: With dead ends: 808 [2022-01-28 14:51:19,950 INFO L226 Difference]: Without dead ends: 778 [2022-01-28 14:51:19,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:51:19,950 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:19,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 187 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-28 14:51:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 413. [2022-01-28 14:51:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1067961165048543) internal successors, (1280), 412 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1280 transitions. [2022-01-28 14:51:19,956 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1280 transitions. Word has length 20 [2022-01-28 14:51:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:19,956 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1280 transitions. [2022-01-28 14:51:19,956 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) [2022-01-28 14:51:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1280 transitions. [2022-01-28 14:51:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:19,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:19,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:19,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:20,157 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 [2022-01-28 14:51:20,158 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1619749641, now seen corresponding path program 87 times [2022-01-28 14:51:20,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:20,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533107683] [2022-01-28 14:51:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:20,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:20,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:20,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533107683] [2022-01-28 14:51:20,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533107683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:20,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369404530] [2022-01-28 14:51:20,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:20,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:20,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:20,300 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) [2022-01-28 14:51:20,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-28 14:51:20,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:51:20,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:20,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:51:20,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:20,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:20,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:20,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:20,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:20,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:20,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:20,849 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:20,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-01-28 14:51:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:20,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369404530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:20,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:20,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-28 14:51:20,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804874681] [2022-01-28 14:51:20,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:20,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:20,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:20,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:20,867 INFO L87 Difference]: Start difference. First operand 413 states and 1280 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) [2022-01-28 14:51:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:22,496 INFO L93 Difference]: Finished difference Result 999 states and 2976 transitions. [2022-01-28 14:51:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 14:51:22,496 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 [2022-01-28 14:51:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:22,497 INFO L225 Difference]: With dead ends: 999 [2022-01-28 14:51:22,498 INFO L226 Difference]: Without dead ends: 954 [2022-01-28 14:51:22,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=626, Invalid=2796, Unknown=0, NotChecked=0, Total=3422 [2022-01-28 14:51:22,498 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 319 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:22,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 298 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:51:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-01-28 14:51:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 411. [2022-01-28 14:51:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 3.1097560975609757) internal successors, (1275), 410 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) [2022-01-28 14:51:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1275 transitions. [2022-01-28 14:51:22,505 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1275 transitions. Word has length 20 [2022-01-28 14:51:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:22,505 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1275 transitions. [2022-01-28 14:51:22,505 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) [2022-01-28 14:51:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1275 transitions. [2022-01-28 14:51:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:22,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:22,506 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:22,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-28 14:51:22,708 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 [2022-01-28 14:51:22,708 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:22,708 INFO L85 PathProgramCache]: Analyzing trace with hash 927869937, now seen corresponding path program 88 times [2022-01-28 14:51:22,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:22,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373197511] [2022-01-28 14:51:22,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:22,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:22,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:22,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373197511] [2022-01-28 14:51:22,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373197511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:22,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100264207] [2022-01-28 14:51:22,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:22,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:22,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:22,812 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) [2022-01-28 14:51:22,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-28 14:51:22,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:22,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:22,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:22,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:22,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:22,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:23,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:23,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:23,156 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:23,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-01-28 14:51:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:23,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100264207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:23,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:23,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-28 14:51:23,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740268117] [2022-01-28 14:51:23,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:23,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:23,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:23,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:23,165 INFO L87 Difference]: Start difference. First operand 411 states and 1275 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) [2022-01-28 14:51:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:23,938 INFO L93 Difference]: Finished difference Result 848 states and 2536 transitions. [2022-01-28 14:51:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:51:23,939 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 [2022-01-28 14:51:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:23,940 INFO L225 Difference]: With dead ends: 848 [2022-01-28 14:51:23,940 INFO L226 Difference]: Without dead ends: 818 [2022-01-28 14:51:23,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:51:23,940 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 202 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:23,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 286 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:51:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-01-28 14:51:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 418. [2022-01-28 14:51:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.1079136690647484) internal successors, (1296), 417 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) [2022-01-28 14:51:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1296 transitions. [2022-01-28 14:51:23,948 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1296 transitions. Word has length 20 [2022-01-28 14:51:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:23,948 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1296 transitions. [2022-01-28 14:51:23,948 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) [2022-01-28 14:51:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1296 transitions. [2022-01-28 14:51:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:23,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:23,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:23,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-28 14:51:24,149 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 [2022-01-28 14:51:24,149 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:24,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:24,149 INFO L85 PathProgramCache]: Analyzing trace with hash -70193263, now seen corresponding path program 89 times [2022-01-28 14:51:24,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:24,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439470963] [2022-01-28 14:51:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:24,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:24,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:24,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439470963] [2022-01-28 14:51:24,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439470963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:24,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240062422] [2022-01-28 14:51:24,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:24,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:24,254 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) [2022-01-28 14:51:24,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-28 14:51:24,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:51:24,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:24,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:24,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:24,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:24,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:24,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:24,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:24,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:24,600 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:24,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-01-28 14:51:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:24,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240062422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:24,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:24,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-28 14:51:24,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671014073] [2022-01-28 14:51:24,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:24,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:24,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:24,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:24,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:24,610 INFO L87 Difference]: Start difference. First operand 418 states and 1296 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) [2022-01-28 14:51:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:25,269 INFO L93 Difference]: Finished difference Result 863 states and 2591 transitions. [2022-01-28 14:51:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:51:25,269 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 [2022-01-28 14:51:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:25,270 INFO L225 Difference]: With dead ends: 863 [2022-01-28 14:51:25,270 INFO L226 Difference]: Without dead ends: 848 [2022-01-28 14:51:25,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 14:51:25,271 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 226 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:25,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 217 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-28 14:51:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 415. [2022-01-28 14:51:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.108695652173913) internal successors, (1287), 414 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1287 transitions. [2022-01-28 14:51:25,277 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1287 transitions. Word has length 20 [2022-01-28 14:51:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:25,277 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1287 transitions. [2022-01-28 14:51:25,277 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) [2022-01-28 14:51:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1287 transitions. [2022-01-28 14:51:25,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:25,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:25,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:25,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-28 14:51:25,478 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 [2022-01-28 14:51:25,479 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1398890683, now seen corresponding path program 90 times [2022-01-28 14:51:25,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:25,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919704708] [2022-01-28 14:51:25,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:25,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:25,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:25,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919704708] [2022-01-28 14:51:25,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919704708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:25,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429897781] [2022-01-28 14:51:25,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:25,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:25,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:25,589 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) [2022-01-28 14:51:25,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-28 14:51:25,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:51:25,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:25,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:25,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:25,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:25,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:25,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:25,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:25,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:25,937 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:51:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-01-28 14:51:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:25,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429897781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:25,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:25,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-01-28 14:51:25,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641222181] [2022-01-28 14:51:25,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:25,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 14:51:25,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:25,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 14:51:25,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:51:25,946 INFO L87 Difference]: Start difference. First operand 415 states and 1287 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) [2022-01-28 14:51:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:26,691 INFO L93 Difference]: Finished difference Result 909 states and 2726 transitions. [2022-01-28 14:51:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:51:26,692 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 [2022-01-28 14:51:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:26,693 INFO L225 Difference]: With dead ends: 909 [2022-01-28 14:51:26,693 INFO L226 Difference]: Without dead ends: 894 [2022-01-28 14:51:26,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:51:26,693 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 321 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:26,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 215 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-01-28 14:51:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 424. [2022-01-28 14:51:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.106382978723404) internal successors, (1314), 423 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1314 transitions. [2022-01-28 14:51:26,700 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1314 transitions. Word has length 20 [2022-01-28 14:51:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:26,700 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1314 transitions. [2022-01-28 14:51:26,700 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) [2022-01-28 14:51:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1314 transitions. [2022-01-28 14:51:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:26,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:26,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:26,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-28 14:51:26,901 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 [2022-01-28 14:51:26,901 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:26,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1575543999, now seen corresponding path program 91 times [2022-01-28 14:51:26,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:26,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475354129] [2022-01-28 14:51:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:26,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:27,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475354129] [2022-01-28 14:51:27,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475354129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164445942] [2022-01-28 14:51:27,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:27,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:27,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:27,015 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) [2022-01-28 14:51:27,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-28 14:51:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:27,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:27,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:27,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:27,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:27,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:27,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:27,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:27,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:27,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:27,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:27,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:27,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:27,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:27,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164445942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:27,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:27,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:27,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410374036] [2022-01-28 14:51:27,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:27,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:27,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:27,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:27,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:27,449 INFO L87 Difference]: Start difference. First operand 424 states and 1314 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) [2022-01-28 14:51:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:28,023 INFO L93 Difference]: Finished difference Result 741 states and 2223 transitions. [2022-01-28 14:51:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:51:28,024 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 [2022-01-28 14:51:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:28,025 INFO L225 Difference]: With dead ends: 741 [2022-01-28 14:51:28,025 INFO L226 Difference]: Without dead ends: 711 [2022-01-28 14:51:28,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:51:28,025 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 164 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:28,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 232 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 767 Invalid, 0 Unknown, 11 Unchecked, 0.3s Time] [2022-01-28 14:51:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-01-28 14:51:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 426. [2022-01-28 14:51:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.108235294117647) internal successors, (1321), 425 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1321 transitions. [2022-01-28 14:51:28,031 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1321 transitions. Word has length 20 [2022-01-28 14:51:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:28,031 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1321 transitions. [2022-01-28 14:51:28,031 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) [2022-01-28 14:51:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1321 transitions. [2022-01-28 14:51:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:28,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:28,032 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] [2022-01-28 14:51:28,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-28 14:51:28,243 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 [2022-01-28 14:51:28,243 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:28,243 INFO L85 PathProgramCache]: Analyzing trace with hash -552918911, now seen corresponding path program 92 times [2022-01-28 14:51:28,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:28,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529731463] [2022-01-28 14:51:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:28,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:28,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:28,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529731463] [2022-01-28 14:51:28,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529731463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:28,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231011550] [2022-01-28 14:51:28,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:28,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:28,393 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) [2022-01-28 14:51:28,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-28 14:51:28,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:28,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:28,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:28,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:28,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:28,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:28,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:28,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:28,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:28,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:28,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:29,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:29,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:29,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:29,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:29,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231011550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:29,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:29,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:29,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177635306] [2022-01-28 14:51:29,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:29,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:29,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:29,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:29,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:29,100 INFO L87 Difference]: Start difference. First operand 426 states and 1321 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) [2022-01-28 14:51:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:29,662 INFO L93 Difference]: Finished difference Result 720 states and 2166 transitions. [2022-01-28 14:51:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:51:29,663 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 [2022-01-28 14:51:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:29,664 INFO L225 Difference]: With dead ends: 720 [2022-01-28 14:51:29,664 INFO L226 Difference]: Without dead ends: 690 [2022-01-28 14:51:29,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:51:29,664 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:29,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 231 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 676 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-01-28 14:51:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-28 14:51:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 427. [2022-01-28 14:51:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.112676056338028) internal successors, (1326), 426 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) [2022-01-28 14:51:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1326 transitions. [2022-01-28 14:51:29,670 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1326 transitions. Word has length 20 [2022-01-28 14:51:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:29,670 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1326 transitions. [2022-01-28 14:51:29,670 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) [2022-01-28 14:51:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1326 transitions. [2022-01-28 14:51:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:29,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:29,671 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] [2022-01-28 14:51:29,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:29,871 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 [2022-01-28 14:51:29,871 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash 368783229, now seen corresponding path program 93 times [2022-01-28 14:51:29,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:29,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895766565] [2022-01-28 14:51:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:29,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:30,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:30,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895766565] [2022-01-28 14:51:30,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895766565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:30,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648225705] [2022-01-28 14:51:30,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:30,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:30,017 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) [2022-01-28 14:51:30,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-28 14:51:30,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:51:30,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:30,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:51:30,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:30,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:30,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:30,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:30,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:30,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:30,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:30,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:30,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:30,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:31,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:31,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:31,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:31,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:31,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648225705] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:31,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:31,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:31,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271454052] [2022-01-28 14:51:31,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:31,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:31,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:31,123 INFO L87 Difference]: Start difference. First operand 427 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) [2022-01-28 14:51:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:31,530 INFO L93 Difference]: Finished difference Result 670 states and 2024 transitions. [2022-01-28 14:51:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:51:31,530 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 [2022-01-28 14:51:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:31,531 INFO L225 Difference]: With dead ends: 670 [2022-01-28 14:51:31,531 INFO L226 Difference]: Without dead ends: 655 [2022-01-28 14:51:31,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:51:31,532 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:31,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 228 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 402 Invalid, 0 Unknown, 219 Unchecked, 0.2s Time] [2022-01-28 14:51:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-28 14:51:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 429. [2022-01-28 14:51:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.116822429906542) internal successors, (1334), 428 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1334 transitions. [2022-01-28 14:51:31,538 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1334 transitions. Word has length 20 [2022-01-28 14:51:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:31,538 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1334 transitions. [2022-01-28 14:51:31,538 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) [2022-01-28 14:51:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1334 transitions. [2022-01-28 14:51:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:31,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:31,539 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] [2022-01-28 14:51:31,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-28 14:51:31,739 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 [2022-01-28 14:51:31,739 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash -384600387, now seen corresponding path program 94 times [2022-01-28 14:51:31,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:31,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432664541] [2022-01-28 14:51:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:31,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:31,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:31,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432664541] [2022-01-28 14:51:31,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432664541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:31,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616663959] [2022-01-28 14:51:31,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:31,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:31,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:31,890 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) [2022-01-28 14:51:31,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-28 14:51:31,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:31,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:31,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:31,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:31,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:31,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:32,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:32,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:32,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:32,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:32,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:32,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:32,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:32,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:32,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:32,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:32,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:32,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616663959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:32,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:32,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:32,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961989438] [2022-01-28 14:51:32,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:32,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:32,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:32,580 INFO L87 Difference]: Start difference. First operand 429 states and 1334 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) [2022-01-28 14:51:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:32,990 INFO L93 Difference]: Finished difference Result 665 states and 2015 transitions. [2022-01-28 14:51:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:51:32,990 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 [2022-01-28 14:51:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:32,991 INFO L225 Difference]: With dead ends: 665 [2022-01-28 14:51:32,992 INFO L226 Difference]: Without dead ends: 658 [2022-01-28 14:51:32,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:51:32,992 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 81 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:32,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 181 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 480 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2022-01-28 14:51:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-28 14:51:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 426. [2022-01-28 14:51:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.108235294117647) internal successors, (1321), 425 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1321 transitions. [2022-01-28 14:51:33,000 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1321 transitions. Word has length 20 [2022-01-28 14:51:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:33,000 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1321 transitions. [2022-01-28 14:51:33,000 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) [2022-01-28 14:51:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1321 transitions. [2022-01-28 14:51:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:33,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:33,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:33,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:33,215 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 [2022-01-28 14:51:33,215 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1694693441, now seen corresponding path program 95 times [2022-01-28 14:51:33,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:33,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081958868] [2022-01-28 14:51:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:33,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:33,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081958868] [2022-01-28 14:51:33,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081958868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:33,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477708016] [2022-01-28 14:51:33,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:33,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:33,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:33,365 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) [2022-01-28 14:51:33,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-28 14:51:33,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:51:33,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:33,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:33,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:33,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:33,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:33,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:33,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:33,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:33,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:33,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:33,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:33,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:33,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:33,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:33,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:33,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:33,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477708016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:33,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:33,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:33,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961199855] [2022-01-28 14:51:33,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:33,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:33,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:33,919 INFO L87 Difference]: Start difference. First operand 426 states and 1321 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) [2022-01-28 14:51:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:34,392 INFO L93 Difference]: Finished difference Result 678 states and 2046 transitions. [2022-01-28 14:51:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:51:34,392 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 [2022-01-28 14:51:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:34,393 INFO L225 Difference]: With dead ends: 678 [2022-01-28 14:51:34,393 INFO L226 Difference]: Without dead ends: 648 [2022-01-28 14:51:34,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:51:34,393 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:34,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 196 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 549 Invalid, 0 Unknown, 302 Unchecked, 0.2s Time] [2022-01-28 14:51:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-28 14:51:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 424. [2022-01-28 14:51:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.104018912529551) internal successors, (1313), 423 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1313 transitions. [2022-01-28 14:51:34,401 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1313 transitions. Word has length 20 [2022-01-28 14:51:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:34,401 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1313 transitions. [2022-01-28 14:51:34,402 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) [2022-01-28 14:51:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1313 transitions. [2022-01-28 14:51:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:34,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:34,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:34,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:34,611 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 [2022-01-28 14:51:34,611 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1056166379, now seen corresponding path program 96 times [2022-01-28 14:51:34,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:34,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781859681] [2022-01-28 14:51:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:34,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:34,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781859681] [2022-01-28 14:51:34,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781859681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:34,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603104689] [2022-01-28 14:51:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:34,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:34,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:34,724 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) [2022-01-28 14:51:34,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-28 14:51:34,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:51:34,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:34,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:34,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:34,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:34,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:34,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:35,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:35,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:35,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:35,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:35,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:35,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:35,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603104689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:35,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:35,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:51:35,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57539750] [2022-01-28 14:51:35,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:35,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:51:35,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:35,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:51:35,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:35,090 INFO L87 Difference]: Start difference. First operand 424 states and 1313 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) [2022-01-28 14:51:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:35,563 INFO L93 Difference]: Finished difference Result 753 states and 2241 transitions. [2022-01-28 14:51:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:51:35,563 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 [2022-01-28 14:51:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:35,564 INFO L225 Difference]: With dead ends: 753 [2022-01-28 14:51:35,564 INFO L226 Difference]: Without dead ends: 738 [2022-01-28 14:51:35,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:51:35,565 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 156 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:35,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 172 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:51:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-01-28 14:51:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 428. [2022-01-28 14:51:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.1030444964871196) internal successors, (1325), 427 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1325 transitions. [2022-01-28 14:51:35,571 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1325 transitions. Word has length 20 [2022-01-28 14:51:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:35,571 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1325 transitions. [2022-01-28 14:51:35,571 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) [2022-01-28 14:51:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1325 transitions. [2022-01-28 14:51:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:35,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:35,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:35,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-28 14:51:35,775 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 [2022-01-28 14:51:35,775 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1197126641, now seen corresponding path program 97 times [2022-01-28 14:51:35,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:35,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527084858] [2022-01-28 14:51:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:35,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:35,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:35,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527084858] [2022-01-28 14:51:35,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527084858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:35,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957534168] [2022-01-28 14:51:35,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:35,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:35,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:35,886 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) [2022-01-28 14:51:35,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-28 14:51:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:35,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:35,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:35,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:36,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:36,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:36,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:36,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:36,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:36,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:36,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:36,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:36,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957534168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:36,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:36,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:51:36,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529543781] [2022-01-28 14:51:36,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:36,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:51:36,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:36,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:51:36,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:51:36,267 INFO L87 Difference]: Start difference. First operand 428 states and 1325 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) [2022-01-28 14:51:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:36,646 INFO L93 Difference]: Finished difference Result 708 states and 2103 transitions. [2022-01-28 14:51:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:51:36,646 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 [2022-01-28 14:51:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:36,647 INFO L225 Difference]: With dead ends: 708 [2022-01-28 14:51:36,647 INFO L226 Difference]: Without dead ends: 678 [2022-01-28 14:51:36,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:36,648 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 96 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:36,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 182 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:51:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-28 14:51:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 432. [2022-01-28 14:51:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.102088167053364) internal successors, (1337), 431 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1337 transitions. [2022-01-28 14:51:36,654 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1337 transitions. Word has length 20 [2022-01-28 14:51:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:36,654 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1337 transitions. [2022-01-28 14:51:36,654 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) [2022-01-28 14:51:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1337 transitions. [2022-01-28 14:51:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:36,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:36,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:36,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:36,855 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 [2022-01-28 14:51:36,855 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:36,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1018546827, now seen corresponding path program 98 times [2022-01-28 14:51:36,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:36,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761979441] [2022-01-28 14:51:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:36,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:36,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761979441] [2022-01-28 14:51:36,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761979441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275231426] [2022-01-28 14:51:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:36,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:36,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:36,985 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) [2022-01-28 14:51:36,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-28 14:51:37,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:37,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:37,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:37,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:37,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:37,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:37,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:37,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:37,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:37,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:37,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:37,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275231426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:37,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:37,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:51:37,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014010342] [2022-01-28 14:51:37,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:37,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:51:37,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:37,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:51:37,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:51:37,342 INFO L87 Difference]: Start difference. First operand 432 states and 1337 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) [2022-01-28 14:51:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:37,828 INFO L93 Difference]: Finished difference Result 726 states and 2146 transitions. [2022-01-28 14:51:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:51:37,828 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 [2022-01-28 14:51:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:37,829 INFO L225 Difference]: With dead ends: 726 [2022-01-28 14:51:37,829 INFO L226 Difference]: Without dead ends: 696 [2022-01-28 14:51:37,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:37,829 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 99 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:37,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 224 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:51:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-28 14:51:37,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 432. [2022-01-28 14:51:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.102088167053364) internal successors, (1337), 431 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1337 transitions. [2022-01-28 14:51:37,835 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1337 transitions. Word has length 20 [2022-01-28 14:51:37,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:37,836 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1337 transitions. [2022-01-28 14:51:37,836 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) [2022-01-28 14:51:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1337 transitions. [2022-01-28 14:51:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:37,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:37,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:37,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-28 14:51:38,037 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 [2022-01-28 14:51:38,037 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:38,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1127623933, now seen corresponding path program 99 times [2022-01-28 14:51:38,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:38,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343700813] [2022-01-28 14:51:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:38,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:38,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:38,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343700813] [2022-01-28 14:51:38,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343700813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555488501] [2022-01-28 14:51:38,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:38,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:38,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:38,168 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) [2022-01-28 14:51:38,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-28 14:51:38,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:51:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:38,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:38,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:51:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:38,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:38,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:38,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:38,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:38,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:38,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:38,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:38,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555488501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:38,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:38,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:51:38,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637514644] [2022-01-28 14:51:38,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:38,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:51:38,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:51:38,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:51:38,601 INFO L87 Difference]: Start difference. First operand 432 states and 1337 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) [2022-01-28 14:51:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:38,883 INFO L93 Difference]: Finished difference Result 644 states and 1924 transitions. [2022-01-28 14:51:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:51:38,884 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 [2022-01-28 14:51:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:38,885 INFO L225 Difference]: With dead ends: 644 [2022-01-28 14:51:38,885 INFO L226 Difference]: Without dead ends: 614 [2022-01-28 14:51:38,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:51:38,885 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:38,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 163 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:51:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-28 14:51:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 424. [2022-01-28 14:51:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.104018912529551) internal successors, (1313), 423 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1313 transitions. [2022-01-28 14:51:38,890 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1313 transitions. Word has length 20 [2022-01-28 14:51:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:38,891 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1313 transitions. [2022-01-28 14:51:38,891 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) [2022-01-28 14:51:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1313 transitions. [2022-01-28 14:51:38,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:38,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:38,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:38,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-28 14:51:39,092 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 [2022-01-28 14:51:39,092 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:39,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2044157039, now seen corresponding path program 100 times [2022-01-28 14:51:39,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:39,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081413225] [2022-01-28 14:51:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:39,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:39,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081413225] [2022-01-28 14:51:39,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081413225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:39,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256434055] [2022-01-28 14:51:39,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:39,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:39,225 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) [2022-01-28 14:51:39,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-28 14:51:39,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:39,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:39,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:39,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:39,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:39,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:39,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:39,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:39,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:39,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:39,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:39,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:39,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:39,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:39,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:39,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:39,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256434055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:39,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:39,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:39,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069844670] [2022-01-28 14:51:39,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:39,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:39,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:39,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:39,739 INFO L87 Difference]: Start difference. First operand 424 states and 1313 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) [2022-01-28 14:51:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:39,979 INFO L93 Difference]: Finished difference Result 614 states and 1863 transitions. [2022-01-28 14:51:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:51:39,980 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 [2022-01-28 14:51:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:39,981 INFO L225 Difference]: With dead ends: 614 [2022-01-28 14:51:39,981 INFO L226 Difference]: Without dead ends: 599 [2022-01-28 14:51:39,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:39,981 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:39,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 173 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 466 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-28 14:51:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-28 14:51:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 428. [2022-01-28 14:51:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.1030444964871196) internal successors, (1325), 427 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1325 transitions. [2022-01-28 14:51:39,988 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1325 transitions. Word has length 20 [2022-01-28 14:51:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:39,988 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1325 transitions. [2022-01-28 14:51:39,988 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) [2022-01-28 14:51:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1325 transitions. [2022-01-28 14:51:39,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:39,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:39,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:40,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-28 14:51:40,213 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 [2022-01-28 14:51:40,213 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:40,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1473926001, now seen corresponding path program 101 times [2022-01-28 14:51:40,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:40,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422928441] [2022-01-28 14:51:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:40,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:40,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422928441] [2022-01-28 14:51:40,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422928441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109954259] [2022-01-28 14:51:40,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:40,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:40,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:40,353 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) [2022-01-28 14:51:40,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-28 14:51:40,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:40,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:40,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:40,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:40,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:40,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:40,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:40,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:40,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:40,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:40,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:40,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:40,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:40,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:40,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:40,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:40,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109954259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:40,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:40,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:40,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5758836] [2022-01-28 14:51:40,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:40,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:40,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:40,895 INFO L87 Difference]: Start difference. First operand 428 states and 1325 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) [2022-01-28 14:51:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:41,137 INFO L93 Difference]: Finished difference Result 660 states and 1982 transitions. [2022-01-28 14:51:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:51:41,137 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 [2022-01-28 14:51:41,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:41,138 INFO L225 Difference]: With dead ends: 660 [2022-01-28 14:51:41,138 INFO L226 Difference]: Without dead ends: 645 [2022-01-28 14:51:41,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:41,139 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:41,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 224 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 413 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-01-28 14:51:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-28 14:51:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 426. [2022-01-28 14:51:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1058823529411765) internal successors, (1320), 425 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) [2022-01-28 14:51:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1320 transitions. [2022-01-28 14:51:41,144 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1320 transitions. Word has length 20 [2022-01-28 14:51:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:41,145 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1320 transitions. [2022-01-28 14:51:41,145 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) [2022-01-28 14:51:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1320 transitions. [2022-01-28 14:51:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:41,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:41,145 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] [2022-01-28 14:51:41,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-28 14:51:41,346 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 [2022-01-28 14:51:41,346 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash 253320373, now seen corresponding path program 102 times [2022-01-28 14:51:41,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:41,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526354864] [2022-01-28 14:51:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:41,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:41,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:41,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526354864] [2022-01-28 14:51:41,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526354864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:41,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815543692] [2022-01-28 14:51:41,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:41,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:41,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:41,512 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) [2022-01-28 14:51:41,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-28 14:51:41,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:51:41,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:41,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:41,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:41,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:41,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:41,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:41,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:41,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:41,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:42,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:42,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:42,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:42,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:42,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:42,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:42,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815543692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:42,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:42,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:42,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700865659] [2022-01-28 14:51:42,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:42,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:42,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:42,186 INFO L87 Difference]: Start difference. First operand 426 states and 1320 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) [2022-01-28 14:51:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:42,492 INFO L93 Difference]: Finished difference Result 684 states and 2044 transitions. [2022-01-28 14:51:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:51:42,493 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 [2022-01-28 14:51:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:42,494 INFO L225 Difference]: With dead ends: 684 [2022-01-28 14:51:42,494 INFO L226 Difference]: Without dead ends: 654 [2022-01-28 14:51:42,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:42,494 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:42,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 204 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 511 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-01-28 14:51:42,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-28 14:51:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 427. [2022-01-28 14:51:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2022-01-28 14:51:42,500 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 20 [2022-01-28 14:51:42,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:42,501 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2022-01-28 14:51:42,501 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) [2022-01-28 14:51:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2022-01-28 14:51:42,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:42,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:42,501 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] [2022-01-28 14:51:42,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-28 14:51:42,702 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 [2022-01-28 14:51:42,702 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:42,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1175022513, now seen corresponding path program 103 times [2022-01-28 14:51:42,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:42,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504296480] [2022-01-28 14:51:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:42,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:42,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:42,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504296480] [2022-01-28 14:51:42,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504296480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:42,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069965223] [2022-01-28 14:51:42,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:42,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:42,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:42,880 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) [2022-01-28 14:51:42,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-28 14:51:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:42,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:42,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:42,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:43,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:43,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:43,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:43,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:43,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:43,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:43,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:43,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:43,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:43,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:43,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:43,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069965223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:43,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:43,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:43,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336195811] [2022-01-28 14:51:43,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:43,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:43,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:43,576 INFO L87 Difference]: Start difference. First operand 427 states and 1325 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) [2022-01-28 14:51:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:43,810 INFO L93 Difference]: Finished difference Result 640 states and 1924 transitions. [2022-01-28 14:51:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:43,811 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 [2022-01-28 14:51:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:43,812 INFO L225 Difference]: With dead ends: 640 [2022-01-28 14:51:43,812 INFO L226 Difference]: Without dead ends: 625 [2022-01-28 14:51:43,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:43,812 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:43,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 205 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 454 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-01-28 14:51:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-28 14:51:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 429. [2022-01-28 14:51:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.114485981308411) internal successors, (1333), 428 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1333 transitions. [2022-01-28 14:51:43,818 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1333 transitions. Word has length 20 [2022-01-28 14:51:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:43,818 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1333 transitions. [2022-01-28 14:51:43,818 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) [2022-01-28 14:51:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1333 transitions. [2022-01-28 14:51:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:43,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:43,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:43,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-28 14:51:44,019 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 [2022-01-28 14:51:44,020 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash 421638897, now seen corresponding path program 104 times [2022-01-28 14:51:44,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:44,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685363757] [2022-01-28 14:51:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:44,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:44,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:44,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685363757] [2022-01-28 14:51:44,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685363757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:44,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976923937] [2022-01-28 14:51:44,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:44,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:44,168 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) [2022-01-28 14:51:44,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-28 14:51:44,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:44,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:44,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:44,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:44,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:44,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:44,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:44,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:44,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:44,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:44,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:44,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:44,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:44,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:44,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:44,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976923937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:44,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:44,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:44,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299478010] [2022-01-28 14:51:44,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:44,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:44,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:44,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:44,813 INFO L87 Difference]: Start difference. First operand 429 states and 1333 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) [2022-01-28 14:51:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:45,096 INFO L93 Difference]: Finished difference Result 665 states and 1996 transitions. [2022-01-28 14:51:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:51:45,096 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 [2022-01-28 14:51:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:45,097 INFO L225 Difference]: With dead ends: 665 [2022-01-28 14:51:45,097 INFO L226 Difference]: Without dead ends: 658 [2022-01-28 14:51:45,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:45,098 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:45,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 193 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 461 Invalid, 0 Unknown, 237 Unchecked, 0.2s Time] [2022-01-28 14:51:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-01-28 14:51:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 426. [2022-01-28 14:51:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1058823529411765) internal successors, (1320), 425 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) [2022-01-28 14:51:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1320 transitions. [2022-01-28 14:51:45,103 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1320 transitions. Word has length 20 [2022-01-28 14:51:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:45,103 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1320 transitions. [2022-01-28 14:51:45,103 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) [2022-01-28 14:51:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1320 transitions. [2022-01-28 14:51:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:45,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:45,104 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] [2022-01-28 14:51:45,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:45,304 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 [2022-01-28 14:51:45,305 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:45,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1794034571, now seen corresponding path program 105 times [2022-01-28 14:51:45,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:45,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427266047] [2022-01-28 14:51:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:45,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:45,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:45,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427266047] [2022-01-28 14:51:45,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427266047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:45,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925047224] [2022-01-28 14:51:45,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:45,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:45,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:45,462 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) [2022-01-28 14:51:45,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-28 14:51:45,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:51:45,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:45,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:51:45,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:45,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:45,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:45,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:45,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:45,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:45,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:45,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:46,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:46,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:46,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:46,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:46,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:46,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:46,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925047224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:46,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:46,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:46,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324406705] [2022-01-28 14:51:46,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:46,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:46,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:46,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:46,174 INFO L87 Difference]: Start difference. First operand 426 states and 1320 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) [2022-01-28 14:51:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:46,606 INFO L93 Difference]: Finished difference Result 695 states and 2096 transitions. [2022-01-28 14:51:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:51:46,606 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 [2022-01-28 14:51:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:46,607 INFO L225 Difference]: With dead ends: 695 [2022-01-28 14:51:46,607 INFO L226 Difference]: Without dead ends: 665 [2022-01-28 14:51:46,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:51:46,607 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:46,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 198 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 506 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2022-01-28 14:51:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-28 14:51:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 426. [2022-01-28 14:51:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1058823529411765) internal successors, (1320), 425 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) [2022-01-28 14:51:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1320 transitions. [2022-01-28 14:51:46,613 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1320 transitions. Word has length 20 [2022-01-28 14:51:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:46,614 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1320 transitions. [2022-01-28 14:51:46,614 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) [2022-01-28 14:51:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1320 transitions. [2022-01-28 14:51:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:46,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:46,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:46,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:46,815 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 [2022-01-28 14:51:46,815 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:46,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1816935659, now seen corresponding path program 106 times [2022-01-28 14:51:46,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:46,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686275822] [2022-01-28 14:51:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:46,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:46,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:46,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686275822] [2022-01-28 14:51:46,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686275822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:46,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330769321] [2022-01-28 14:51:46,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:46,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:46,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:46,978 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) [2022-01-28 14:51:46,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-28 14:51:47,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:47,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:47,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:47,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:47,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:47,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:47,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:47,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:47,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:47,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:47,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:47,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:47,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:47,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:47,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:47,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:47,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:47,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330769321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:47,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:47,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:47,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205829808] [2022-01-28 14:51:47,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:47,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:47,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:47,485 INFO L87 Difference]: Start difference. First operand 426 states and 1320 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) [2022-01-28 14:51:47,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:47,675 INFO L93 Difference]: Finished difference Result 612 states and 1858 transitions. [2022-01-28 14:51:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:51:47,676 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 [2022-01-28 14:51:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:47,677 INFO L225 Difference]: With dead ends: 612 [2022-01-28 14:51:47,677 INFO L226 Difference]: Without dead ends: 597 [2022-01-28 14:51:47,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:47,677 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:47,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 104 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 326 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-01-28 14:51:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-28 14:51:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 427. [2022-01-28 14:51:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2022-01-28 14:51:47,683 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 20 [2022-01-28 14:51:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:47,683 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2022-01-28 14:51:47,683 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) [2022-01-28 14:51:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2022-01-28 14:51:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:47,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:47,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:47,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:47,884 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 [2022-01-28 14:51:47,884 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1701147381, now seen corresponding path program 107 times [2022-01-28 14:51:47,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763579444] [2022-01-28 14:51:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:47,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:48,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:48,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763579444] [2022-01-28 14:51:48,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763579444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:48,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742074390] [2022-01-28 14:51:48,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:48,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:48,046 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) [2022-01-28 14:51:48,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-28 14:51:48,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:48,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:48,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:48,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:48,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:48,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:48,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:48,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:48,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:48,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:48,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:48,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:48,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:48,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:48,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:48,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:48,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:48,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742074390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:48,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:48,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:48,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843367518] [2022-01-28 14:51:48,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:48,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:48,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:48,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:48,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:48,567 INFO L87 Difference]: Start difference. First operand 427 states and 1325 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) [2022-01-28 14:51:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:48,839 INFO L93 Difference]: Finished difference Result 676 states and 2027 transitions. [2022-01-28 14:51:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:51:48,840 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 [2022-01-28 14:51:48,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:48,841 INFO L225 Difference]: With dead ends: 676 [2022-01-28 14:51:48,841 INFO L226 Difference]: Without dead ends: 661 [2022-01-28 14:51:48,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:48,841 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:48,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 206 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 487 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-01-28 14:51:48,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-28 14:51:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 427. [2022-01-28 14:51:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2022-01-28 14:51:48,849 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 20 [2022-01-28 14:51:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:48,849 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2022-01-28 14:51:48,849 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) [2022-01-28 14:51:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2022-01-28 14:51:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:48,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:48,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:48,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:49,072 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 [2022-01-28 14:51:49,072 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:49,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:49,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1220829743, now seen corresponding path program 108 times [2022-01-28 14:51:49,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:49,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666197860] [2022-01-28 14:51:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:49,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:49,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:49,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666197860] [2022-01-28 14:51:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666197860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:49,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286574810] [2022-01-28 14:51:49,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:49,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:49,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:49,206 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) [2022-01-28 14:51:49,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-28 14:51:49,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:51:49,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:49,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:49,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:49,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:49,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:49,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:49,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:49,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:49,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:49,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:49,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:49,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:49,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:49,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:49,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:49,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286574810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:49,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:49,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:51:49,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135141105] [2022-01-28 14:51:49,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:49,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:51:49,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:51:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:51:49,643 INFO L87 Difference]: Start difference. First operand 427 states and 1325 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) [2022-01-28 14:51:49,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:49,843 INFO L93 Difference]: Finished difference Result 610 states and 1851 transitions. [2022-01-28 14:51:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:51:49,843 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 [2022-01-28 14:51:49,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:49,844 INFO L225 Difference]: With dead ends: 610 [2022-01-28 14:51:49,844 INFO L226 Difference]: Without dead ends: 595 [2022-01-28 14:51:49,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:51:49,844 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:49,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 107 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 351 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-01-28 14:51:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-28 14:51:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 427. [2022-01-28 14:51:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2022-01-28 14:51:49,850 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 20 [2022-01-28 14:51:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:49,850 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2022-01-28 14:51:49,850 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) [2022-01-28 14:51:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2022-01-28 14:51:49,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:49,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:49,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:49,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:50,052 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 [2022-01-28 14:51:50,052 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash -695329103, now seen corresponding path program 109 times [2022-01-28 14:51:50,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:50,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753724350] [2022-01-28 14:51:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:50,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:50,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753724350] [2022-01-28 14:51:50,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753724350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863990926] [2022-01-28 14:51:50,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:50,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:50,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:50,233 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) [2022-01-28 14:51:50,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-28 14:51:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:50,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:50,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:50,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:50,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:50,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:50,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:50,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:50,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:50,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:50,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:50,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:50,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:50,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:50,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:50,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863990926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:50,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:50,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:50,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125697442] [2022-01-28 14:51:50,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:50,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:50,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:50,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:50,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:50,833 INFO L87 Difference]: Start difference. First operand 427 states and 1325 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) [2022-01-28 14:51:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:51,141 INFO L93 Difference]: Finished difference Result 676 states and 2020 transitions. [2022-01-28 14:51:51,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:51:51,141 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 [2022-01-28 14:51:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:51,142 INFO L225 Difference]: With dead ends: 676 [2022-01-28 14:51:51,142 INFO L226 Difference]: Without dead ends: 661 [2022-01-28 14:51:51,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:51:51,143 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:51,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 232 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 607 Invalid, 0 Unknown, 220 Unchecked, 0.2s Time] [2022-01-28 14:51:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-28 14:51:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 427. [2022-01-28 14:51:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2022-01-28 14:51:51,148 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 20 [2022-01-28 14:51:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:51,148 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2022-01-28 14:51:51,148 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) [2022-01-28 14:51:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2022-01-28 14:51:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:51,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:51,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:51,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-28 14:51:51,349 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 [2022-01-28 14:51:51,350 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:51,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:51,350 INFO L85 PathProgramCache]: Analyzing trace with hash 293731445, now seen corresponding path program 110 times [2022-01-28 14:51:51,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:51,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884056770] [2022-01-28 14:51:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:51,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:51,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884056770] [2022-01-28 14:51:51,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884056770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:51,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853092299] [2022-01-28 14:51:51,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:51,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:51,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:51,477 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) [2022-01-28 14:51:51,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-28 14:51:51,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:51,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:51,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:51,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:51,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:51,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:51,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:51,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:51,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:51,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:51:51,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:51,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:51,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:51:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:51,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853092299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:51,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:51,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:51:51,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022305565] [2022-01-28 14:51:51,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:51,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:51:51,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:51,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:51:51,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:51:51,925 INFO L87 Difference]: Start difference. First operand 427 states and 1325 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) [2022-01-28 14:51:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:52,143 INFO L93 Difference]: Finished difference Result 625 states and 1884 transitions. [2022-01-28 14:51:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:51:52,143 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 [2022-01-28 14:51:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:52,144 INFO L225 Difference]: With dead ends: 625 [2022-01-28 14:51:52,144 INFO L226 Difference]: Without dead ends: 610 [2022-01-28 14:51:52,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:52,145 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:52,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 130 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 396 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-01-28 14:51:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-28 14:51:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 426. [2022-01-28 14:51:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1058823529411765) internal successors, (1320), 425 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) [2022-01-28 14:51:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1320 transitions. [2022-01-28 14:51:52,150 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1320 transitions. Word has length 20 [2022-01-28 14:51:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:52,150 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1320 transitions. [2022-01-28 14:51:52,150 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) [2022-01-28 14:51:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1320 transitions. [2022-01-28 14:51:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:52,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:52,151 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] [2022-01-28 14:51:52,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-28 14:51:52,351 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 [2022-01-28 14:51:52,351 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2132246361, now seen corresponding path program 111 times [2022-01-28 14:51:52,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:52,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089432239] [2022-01-28 14:51:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:52,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:52,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:52,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089432239] [2022-01-28 14:51:52,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089432239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:52,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675516553] [2022-01-28 14:51:52,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:52,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:52,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:52,468 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) [2022-01-28 14:51:52,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-28 14:51:52,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:51:52,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:52,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:52,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:52,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:52,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:52,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:52,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:52,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:52,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:52,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:52,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:53,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:53,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:53,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:53,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:53,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675516553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:53,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:53,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:51:53,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759999386] [2022-01-28 14:51:53,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:53,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:51:53,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:51:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:51:53,098 INFO L87 Difference]: Start difference. First operand 426 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) [2022-01-28 14:51:53,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:53,310 INFO L93 Difference]: Finished difference Result 611 states and 1841 transitions. [2022-01-28 14:51:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:51:53,310 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 [2022-01-28 14:51:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:53,311 INFO L225 Difference]: With dead ends: 611 [2022-01-28 14:51:53,311 INFO L226 Difference]: Without dead ends: 581 [2022-01-28 14:51:53,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:53,311 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:53,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 180 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 474 Invalid, 0 Unknown, 235 Unchecked, 0.2s Time] [2022-01-28 14:51:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-28 14:51:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 428. [2022-01-28 14:51:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.1124121779859486) internal successors, (1329), 427 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:53,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1329 transitions. [2022-01-28 14:51:53,317 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1329 transitions. Word has length 20 [2022-01-28 14:51:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:53,317 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1329 transitions. [2022-01-28 14:51:53,317 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) [2022-01-28 14:51:53,317 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1329 transitions. [2022-01-28 14:51:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:53,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:53,318 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] [2022-01-28 14:51:53,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-28 14:51:53,518 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 [2022-01-28 14:51:53,518 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1210544221, now seen corresponding path program 112 times [2022-01-28 14:51:53,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:53,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61864662] [2022-01-28 14:51:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:53,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:53,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:53,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61864662] [2022-01-28 14:51:53,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61864662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:53,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087081818] [2022-01-28 14:51:53,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:51:53,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:53,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:53,656 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) [2022-01-28 14:51:53,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-28 14:51:53,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:51:53,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:53,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:53,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:53,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:53,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:53,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:53,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:53,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:54,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:54,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:54,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:54,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:54,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:54,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:54,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:54,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087081818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:54,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:54,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:54,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673969575] [2022-01-28 14:51:54,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:54,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:54,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:54,258 INFO L87 Difference]: Start difference. First operand 428 states and 1329 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) [2022-01-28 14:51:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:54,514 INFO L93 Difference]: Finished difference Result 641 states and 1928 transitions. [2022-01-28 14:51:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:54,514 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 [2022-01-28 14:51:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:54,515 INFO L225 Difference]: With dead ends: 641 [2022-01-28 14:51:54,515 INFO L226 Difference]: Without dead ends: 626 [2022-01-28 14:51:54,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:54,515 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:54,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 192 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 501 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-01-28 14:51:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-28 14:51:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 430. [2022-01-28 14:51:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1165501165501164) internal successors, (1337), 429 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1337 transitions. [2022-01-28 14:51:54,521 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1337 transitions. Word has length 20 [2022-01-28 14:51:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:54,521 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1337 transitions. [2022-01-28 14:51:54,521 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) [2022-01-28 14:51:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1337 transitions. [2022-01-28 14:51:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:54,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:54,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:54,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-28 14:51:54,722 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 [2022-01-28 14:51:54,723 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1963927837, now seen corresponding path program 113 times [2022-01-28 14:51:54,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:54,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601191015] [2022-01-28 14:51:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:54,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:54,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:54,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601191015] [2022-01-28 14:51:54,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601191015] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:54,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45487488] [2022-01-28 14:51:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:51:54,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:54,892 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) [2022-01-28 14:51:54,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-28 14:51:54,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:54,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:54,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:55,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:55,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:55,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:55,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:55,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:55,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:55,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:55,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:55,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:55,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:55,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:55,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45487488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:55,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:55,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:55,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697673244] [2022-01-28 14:51:55,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:55,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:55,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:55,531 INFO L87 Difference]: Start difference. First operand 430 states and 1337 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) [2022-01-28 14:51:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:55,808 INFO L93 Difference]: Finished difference Result 635 states and 1911 transitions. [2022-01-28 14:51:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:51:55,808 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 [2022-01-28 14:51:55,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:55,809 INFO L225 Difference]: With dead ends: 635 [2022-01-28 14:51:55,809 INFO L226 Difference]: Without dead ends: 628 [2022-01-28 14:51:55,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:55,810 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:55,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 210 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 549 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2022-01-28 14:51:55,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-28 14:51:55,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 427. [2022-01-28 14:51:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.107981220657277) internal successors, (1324), 426 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1324 transitions. [2022-01-28 14:51:55,816 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1324 transitions. Word has length 20 [2022-01-28 14:51:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:55,817 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1324 transitions. [2022-01-28 14:51:55,817 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) [2022-01-28 14:51:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1324 transitions. [2022-01-28 14:51:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:55,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:55,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:55,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:56,031 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 [2022-01-28 14:51:56,031 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash 115365991, now seen corresponding path program 114 times [2022-01-28 14:51:56,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:56,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714971444] [2022-01-28 14:51:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:56,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:56,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714971444] [2022-01-28 14:51:56,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714971444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090778046] [2022-01-28 14:51:56,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:51:56,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:56,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:56,199 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) [2022-01-28 14:51:56,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-28 14:51:56,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:51:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:56,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:56,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:56,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:56,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:56,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:56,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:56,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:56,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:56,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:56,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:56,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:56,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:56,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:56,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:56,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:56,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090778046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:56,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:56,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:51:56,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899909404] [2022-01-28 14:51:56,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:56,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:51:56,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:51:56,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:56,760 INFO L87 Difference]: Start difference. First operand 427 states and 1324 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) [2022-01-28 14:51:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:57,009 INFO L93 Difference]: Finished difference Result 648 states and 1942 transitions. [2022-01-28 14:51:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:51:57,010 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 [2022-01-28 14:51:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:57,011 INFO L225 Difference]: With dead ends: 648 [2022-01-28 14:51:57,011 INFO L226 Difference]: Without dead ends: 618 [2022-01-28 14:51:57,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:51:57,011 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:57,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 165 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 461 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-01-28 14:51:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-28 14:51:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 427. [2022-01-28 14:51:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.107981220657277) internal successors, (1324), 426 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1324 transitions. [2022-01-28 14:51:57,017 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1324 transitions. Word has length 20 [2022-01-28 14:51:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:57,017 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 1324 transitions. [2022-01-28 14:51:57,017 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) [2022-01-28 14:51:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1324 transitions. [2022-01-28 14:51:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:57,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:57,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:57,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-28 14:51:57,218 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 [2022-01-28 14:51:57,218 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:57,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2125625709, now seen corresponding path program 115 times [2022-01-28 14:51:57,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:57,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728685769] [2022-01-28 14:51:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:57,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:57,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:57,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728685769] [2022-01-28 14:51:57,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728685769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:57,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412737915] [2022-01-28 14:51:57,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:51:57,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:57,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:57,336 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) [2022-01-28 14:51:57,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-28 14:51:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:57,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:57,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:57,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:57,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:57,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:57,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:57,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:57,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:57,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:57,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:57,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:57,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:57,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:57,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412737915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:57,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:57,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:51:57,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905191679] [2022-01-28 14:51:57,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:57,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:51:57,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:51:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:51:57,918 INFO L87 Difference]: Start difference. First operand 427 states and 1324 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) [2022-01-28 14:51:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:58,109 INFO L93 Difference]: Finished difference Result 600 states and 1811 transitions. [2022-01-28 14:51:58,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:51:58,110 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 [2022-01-28 14:51:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:58,110 INFO L225 Difference]: With dead ends: 600 [2022-01-28 14:51:58,111 INFO L226 Difference]: Without dead ends: 585 [2022-01-28 14:51:58,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:58,111 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:58,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 159 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 400 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-01-28 14:51:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-28 14:51:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 432. [2022-01-28 14:51:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.109048723897912) internal successors, (1340), 431 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1340 transitions. [2022-01-28 14:51:58,116 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1340 transitions. Word has length 20 [2022-01-28 14:51:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:58,116 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1340 transitions. [2022-01-28 14:51:58,116 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) [2022-01-28 14:51:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1340 transitions. [2022-01-28 14:51:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:58,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:58,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:58,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-28 14:51:58,319 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 [2022-01-28 14:51:58,320 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1415957971, now seen corresponding path program 116 times [2022-01-28 14:51:58,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:58,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220668457] [2022-01-28 14:51:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:58,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:58,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:58,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220668457] [2022-01-28 14:51:58,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220668457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:58,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732339709] [2022-01-28 14:51:58,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:51:58,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:58,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:58,431 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) [2022-01-28 14:51:58,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-28 14:51:58,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:51:58,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:58,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:58,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:58,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:58,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:58,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:58,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:58,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:58,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:58,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:58,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:58,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:58,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:58,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:51:58,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:51:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:59,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732339709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:51:59,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:51:59,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:51:59,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472899541] [2022-01-28 14:51:59,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:51:59,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:51:59,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:51:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:51:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:51:59,019 INFO L87 Difference]: Start difference. First operand 432 states and 1340 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) [2022-01-28 14:51:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:51:59,218 INFO L93 Difference]: Finished difference Result 593 states and 1791 transitions. [2022-01-28 14:51:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:51:59,219 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 [2022-01-28 14:51:59,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:51:59,220 INFO L225 Difference]: With dead ends: 593 [2022-01-28 14:51:59,220 INFO L226 Difference]: Without dead ends: 586 [2022-01-28 14:51:59,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:51:59,221 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:51:59,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 153 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-01-28 14:51:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-28 14:51:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 430. [2022-01-28 14:51:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.104895104895105) internal successors, (1332), 429 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:51:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1332 transitions. [2022-01-28 14:51:59,227 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1332 transitions. Word has length 20 [2022-01-28 14:51:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:51:59,228 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1332 transitions. [2022-01-28 14:51:59,228 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) [2022-01-28 14:51:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1332 transitions. [2022-01-28 14:51:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:51:59,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:51:59,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:51:59,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-28 14:51:59,431 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 [2022-01-28 14:51:59,431 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:51:59,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:51:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash -799715497, now seen corresponding path program 117 times [2022-01-28 14:51:59,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:51:59,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942862376] [2022-01-28 14:51:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:51:59,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:51:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:51:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:59,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:51:59,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942862376] [2022-01-28 14:51:59,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942862376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:51:59,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139427711] [2022-01-28 14:51:59,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:51:59,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:51:59,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:51:59,573 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) [2022-01-28 14:51:59,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-28 14:51:59,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:51:59,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:51:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:51:59,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:51:59,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:59,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:51:59,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:59,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:59,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:51:59,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:51:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:51:59,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:51:59,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:51:59,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:00,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:00,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:00,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:00,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:00,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139427711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:00,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:00,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:52:00,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363842521] [2022-01-28 14:52:00,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:00,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:52:00,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:00,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:52:00,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:52:00,133 INFO L87 Difference]: Start difference. First operand 430 states and 1332 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) [2022-01-28 14:52:00,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:00,354 INFO L93 Difference]: Finished difference Result 591 states and 1788 transitions. [2022-01-28 14:52:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:00,354 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 [2022-01-28 14:52:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:00,355 INFO L225 Difference]: With dead ends: 591 [2022-01-28 14:52:00,355 INFO L226 Difference]: Without dead ends: 576 [2022-01-28 14:52:00,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:00,356 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:00,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 152 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 452 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-28 14:52:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-28 14:52:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 430. [2022-01-28 14:52:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.104895104895105) internal successors, (1332), 429 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1332 transitions. [2022-01-28 14:52:00,361 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1332 transitions. Word has length 20 [2022-01-28 14:52:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:00,361 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1332 transitions. [2022-01-28 14:52:00,362 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) [2022-01-28 14:52:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1332 transitions. [2022-01-28 14:52:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:00,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:00,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:00,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:00,563 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 [2022-01-28 14:52:00,563 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:00,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1315653099, now seen corresponding path program 118 times [2022-01-28 14:52:00,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:00,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062237358] [2022-01-28 14:52:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:00,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:00,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:00,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062237358] [2022-01-28 14:52:00,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062237358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:00,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508109656] [2022-01-28 14:52:00,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:00,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:00,676 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) [2022-01-28 14:52:00,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-28 14:52:00,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:00,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:00,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:00,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:00,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:00,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:00,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:00,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:01,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:01,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:01,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:01,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:01,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:01,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:01,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508109656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:01,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:01,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:52:01,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350734728] [2022-01-28 14:52:01,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:01,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:52:01,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:01,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:52:01,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:52:01,149 INFO L87 Difference]: Start difference. First operand 430 states and 1332 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) [2022-01-28 14:52:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:01,353 INFO L93 Difference]: Finished difference Result 590 states and 1779 transitions. [2022-01-28 14:52:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:01,353 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 [2022-01-28 14:52:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:01,354 INFO L225 Difference]: With dead ends: 590 [2022-01-28 14:52:01,354 INFO L226 Difference]: Without dead ends: 583 [2022-01-28 14:52:01,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:01,355 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:01,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 141 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 391 Invalid, 0 Unknown, 149 Unchecked, 0.2s Time] [2022-01-28 14:52:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-28 14:52:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 430. [2022-01-28 14:52:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.104895104895105) internal successors, (1332), 429 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1332 transitions. [2022-01-28 14:52:01,360 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1332 transitions. Word has length 20 [2022-01-28 14:52:01,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:01,360 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1332 transitions. [2022-01-28 14:52:01,360 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) [2022-01-28 14:52:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1332 transitions. [2022-01-28 14:52:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:01,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:01,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:01,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-28 14:52:01,561 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 [2022-01-28 14:52:01,561 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 830517661, now seen corresponding path program 119 times [2022-01-28 14:52:01,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:01,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138370977] [2022-01-28 14:52:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:01,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:01,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:01,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138370977] [2022-01-28 14:52:01,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138370977] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:01,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090933886] [2022-01-28 14:52:01,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:01,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:01,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:01,671 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) [2022-01-28 14:52:01,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-28 14:52:01,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:52:01,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:01,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:01,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:01,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:01,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:01,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:01,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:01,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:02,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:02,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:02,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:02,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:02,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:02,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090933886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:02,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:02,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:52:02,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025441114] [2022-01-28 14:52:02,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:02,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:52:02,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:52:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:52:02,122 INFO L87 Difference]: Start difference. First operand 430 states and 1332 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) [2022-01-28 14:52:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:02,324 INFO L93 Difference]: Finished difference Result 571 states and 1726 transitions. [2022-01-28 14:52:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:52:02,324 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 [2022-01-28 14:52:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:02,325 INFO L225 Difference]: With dead ends: 571 [2022-01-28 14:52:02,325 INFO L226 Difference]: Without dead ends: 541 [2022-01-28 14:52:02,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:52:02,325 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:02,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 181 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 493 Invalid, 0 Unknown, 229 Unchecked, 0.2s Time] [2022-01-28 14:52:02,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-28 14:52:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 434. [2022-01-28 14:52:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.113163972286374) internal successors, (1348), 433 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1348 transitions. [2022-01-28 14:52:02,331 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1348 transitions. Word has length 20 [2022-01-28 14:52:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:02,331 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1348 transitions. [2022-01-28 14:52:02,331 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) [2022-01-28 14:52:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1348 transitions. [2022-01-28 14:52:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:02,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:02,331 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] [2022-01-28 14:52:02,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-28 14:52:02,532 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 [2022-01-28 14:52:02,532 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1417433263, now seen corresponding path program 120 times [2022-01-28 14:52:02,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:02,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813782568] [2022-01-28 14:52:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:02,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:02,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813782568] [2022-01-28 14:52:02,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813782568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540006547] [2022-01-28 14:52:02,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:02,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:02,677 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) [2022-01-28 14:52:02,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-28 14:52:02,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:52:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:02,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:02,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:02,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:02,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:02,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:02,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:02,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:02,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:02,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:03,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:03,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:03,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:03,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:03,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:03,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:03,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540006547] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:03,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:03,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:03,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814423595] [2022-01-28 14:52:03,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:03,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:03,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:03,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:03,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:03,178 INFO L87 Difference]: Start difference. First operand 434 states and 1348 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) [2022-01-28 14:52:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:03,384 INFO L93 Difference]: Finished difference Result 638 states and 1889 transitions. [2022-01-28 14:52:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:52:03,384 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 [2022-01-28 14:52:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:03,385 INFO L225 Difference]: With dead ends: 638 [2022-01-28 14:52:03,385 INFO L226 Difference]: Without dead ends: 608 [2022-01-28 14:52:03,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:03,385 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:03,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 179 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 453 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-01-28 14:52:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-28 14:52:03,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 430. [2022-01-28 14:52:03,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.114219114219114) internal successors, (1336), 429 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1336 transitions. [2022-01-28 14:52:03,391 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1336 transitions. Word has length 20 [2022-01-28 14:52:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:03,391 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1336 transitions. [2022-01-28 14:52:03,391 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) [2022-01-28 14:52:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1336 transitions. [2022-01-28 14:52:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:03,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:03,391 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:03,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-28 14:52:03,592 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 [2022-01-28 14:52:03,592 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1327832027, now seen corresponding path program 121 times [2022-01-28 14:52:03,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:03,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331854528] [2022-01-28 14:52:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:03,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:03,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:03,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331854528] [2022-01-28 14:52:03,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331854528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:03,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203417066] [2022-01-28 14:52:03,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:03,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:03,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:03,744 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) [2022-01-28 14:52:03,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-28 14:52:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:03,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:03,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:03,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:03,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:03,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:03,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:03,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:04,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:04,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:04,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:04,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:04,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:04,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:04,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:04,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203417066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:04,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:04,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:04,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833354885] [2022-01-28 14:52:04,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:04,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:04,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:04,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:04,247 INFO L87 Difference]: Start difference. First operand 430 states and 1336 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) [2022-01-28 14:52:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:04,478 INFO L93 Difference]: Finished difference Result 600 states and 1805 transitions. [2022-01-28 14:52:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:04,478 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 [2022-01-28 14:52:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:04,479 INFO L225 Difference]: With dead ends: 600 [2022-01-28 14:52:04,479 INFO L226 Difference]: Without dead ends: 585 [2022-01-28 14:52:04,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:04,479 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:04,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 199 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 535 Invalid, 0 Unknown, 266 Unchecked, 0.2s Time] [2022-01-28 14:52:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-28 14:52:04,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 433. [2022-01-28 14:52:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1180555555555554) internal successors, (1347), 432 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1347 transitions. [2022-01-28 14:52:04,485 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1347 transitions. Word has length 20 [2022-01-28 14:52:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:04,485 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1347 transitions. [2022-01-28 14:52:04,485 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) [2022-01-28 14:52:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1347 transitions. [2022-01-28 14:52:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:04,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:04,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:04,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-28 14:52:04,686 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 [2022-01-28 14:52:04,686 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:04,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1058956935, now seen corresponding path program 122 times [2022-01-28 14:52:04,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:04,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052233408] [2022-01-28 14:52:04,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:04,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:04,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:04,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052233408] [2022-01-28 14:52:04,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052233408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:04,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102823290] [2022-01-28 14:52:04,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:04,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:04,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:04,835 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) [2022-01-28 14:52:04,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-28 14:52:04,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:04,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:04,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:04,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:04,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:04,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:05,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:05,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:05,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:05,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:05,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:05,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:05,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:05,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:05,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:05,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:05,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:05,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102823290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:05,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:05,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:05,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719594025] [2022-01-28 14:52:05,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:05,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:05,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:05,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:05,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:05,342 INFO L87 Difference]: Start difference. First operand 433 states and 1347 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) [2022-01-28 14:52:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:05,574 INFO L93 Difference]: Finished difference Result 642 states and 1892 transitions. [2022-01-28 14:52:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:05,574 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 [2022-01-28 14:52:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:05,575 INFO L225 Difference]: With dead ends: 642 [2022-01-28 14:52:05,575 INFO L226 Difference]: Without dead ends: 612 [2022-01-28 14:52:05,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:05,576 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:05,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 178 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 464 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-01-28 14:52:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-28 14:52:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 426. [2022-01-28 14:52:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1058823529411765) internal successors, (1320), 425 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) [2022-01-28 14:52:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1320 transitions. [2022-01-28 14:52:05,581 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1320 transitions. Word has length 20 [2022-01-28 14:52:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:05,582 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1320 transitions. [2022-01-28 14:52:05,582 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) [2022-01-28 14:52:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1320 transitions. [2022-01-28 14:52:05,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:05,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:05,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:05,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:05,787 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 [2022-01-28 14:52:05,788 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash -968313187, now seen corresponding path program 123 times [2022-01-28 14:52:05,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:05,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603710364] [2022-01-28 14:52:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:05,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:05,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603710364] [2022-01-28 14:52:05,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603710364] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141472159] [2022-01-28 14:52:05,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:05,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:05,921 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) [2022-01-28 14:52:05,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-28 14:52:05,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:52:05,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:05,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:05,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:06,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:06,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:06,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:06,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:06,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:06,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:06,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:06,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:06,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:06,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:06,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:06,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:06,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:06,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141472159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:06,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:06,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:06,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811336755] [2022-01-28 14:52:06,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:06,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:06,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:06,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:06,400 INFO L87 Difference]: Start difference. First operand 426 states and 1320 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) [2022-01-28 14:52:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:06,641 INFO L93 Difference]: Finished difference Result 618 states and 1862 transitions. [2022-01-28 14:52:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:06,641 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 [2022-01-28 14:52:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:06,642 INFO L225 Difference]: With dead ends: 618 [2022-01-28 14:52:06,642 INFO L226 Difference]: Without dead ends: 603 [2022-01-28 14:52:06,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:06,642 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:06,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 152 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 465 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-28 14:52:06,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-28 14:52:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 430. [2022-01-28 14:52:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2022-01-28 14:52:06,648 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 20 [2022-01-28 14:52:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:06,648 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2022-01-28 14:52:06,648 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) [2022-01-28 14:52:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2022-01-28 14:52:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:06,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:06,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:06,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-28 14:52:06,849 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 [2022-01-28 14:52:06,849 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:06,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1745197443, now seen corresponding path program 124 times [2022-01-28 14:52:06,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:06,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423674299] [2022-01-28 14:52:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:06,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:06,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:06,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423674299] [2022-01-28 14:52:06,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423674299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:06,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818118073] [2022-01-28 14:52:06,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:06,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:06,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:06,984 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) [2022-01-28 14:52:06,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-28 14:52:07,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:07,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:07,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:07,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:07,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:07,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:07,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:07,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:07,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:07,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:07,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:07,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:07,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:07,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:07,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:07,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:07,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818118073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:07,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:07,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:07,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115451389] [2022-01-28 14:52:07,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:07,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:07,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:07,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:07,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:07,474 INFO L87 Difference]: Start difference. First operand 430 states and 1334 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) [2022-01-28 14:52:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:07,702 INFO L93 Difference]: Finished difference Result 641 states and 1918 transitions. [2022-01-28 14:52:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:07,702 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 [2022-01-28 14:52:07,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:07,703 INFO L225 Difference]: With dead ends: 641 [2022-01-28 14:52:07,703 INFO L226 Difference]: Without dead ends: 626 [2022-01-28 14:52:07,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:07,703 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:07,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 162 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 423 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-28 14:52:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-28 14:52:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 430. [2022-01-28 14:52:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2022-01-28 14:52:07,709 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 20 [2022-01-28 14:52:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:07,709 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2022-01-28 14:52:07,709 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) [2022-01-28 14:52:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2022-01-28 14:52:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:07,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:07,709 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] [2022-01-28 14:52:07,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-28 14:52:07,910 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 [2022-01-28 14:52:07,910 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:07,910 INFO L85 PathProgramCache]: Analyzing trace with hash -372207271, now seen corresponding path program 125 times [2022-01-28 14:52:07,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:07,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821966494] [2022-01-28 14:52:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:07,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:08,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:08,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821966494] [2022-01-28 14:52:08,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821966494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:08,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854829542] [2022-01-28 14:52:08,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:08,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:08,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:08,042 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) [2022-01-28 14:52:08,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-28 14:52:08,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:52:08,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:08,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:08,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:08,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:08,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:08,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:08,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:08,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:08,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:08,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:08,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:08,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:08,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:08,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:08,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854829542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:08,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:08,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:08,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393803151] [2022-01-28 14:52:08,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:08,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:08,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:08,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:08,488 INFO L87 Difference]: Start difference. First operand 430 states and 1334 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) [2022-01-28 14:52:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:08,776 INFO L93 Difference]: Finished difference Result 612 states and 1847 transitions. [2022-01-28 14:52:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:52:08,776 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 [2022-01-28 14:52:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:08,777 INFO L225 Difference]: With dead ends: 612 [2022-01-28 14:52:08,777 INFO L226 Difference]: Without dead ends: 597 [2022-01-28 14:52:08,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:08,778 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:08,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 167 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 553 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-28 14:52:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-28 14:52:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 430. [2022-01-28 14:52:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2022-01-28 14:52:08,783 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 20 [2022-01-28 14:52:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:08,783 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2022-01-28 14:52:08,783 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) [2022-01-28 14:52:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2022-01-28 14:52:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:08,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:08,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:08,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-28 14:52:08,984 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 [2022-01-28 14:52:08,984 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash 153293369, now seen corresponding path program 126 times [2022-01-28 14:52:08,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:08,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711377571] [2022-01-28 14:52:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:08,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:09,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:09,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711377571] [2022-01-28 14:52:09,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711377571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:09,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283416593] [2022-01-28 14:52:09,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:09,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:09,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:09,133 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) [2022-01-28 14:52:09,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-28 14:52:09,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:52:09,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:09,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:09,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:09,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:09,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:09,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:09,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:09,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:09,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:09,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:09,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:09,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:09,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:09,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:09,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283416593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:09,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:09,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007548273] [2022-01-28 14:52:09,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:09,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:09,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:09,618 INFO L87 Difference]: Start difference. First operand 430 states and 1334 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) [2022-01-28 14:52:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:09,887 INFO L93 Difference]: Finished difference Result 650 states and 1935 transitions. [2022-01-28 14:52:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:09,887 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 [2022-01-28 14:52:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:09,888 INFO L225 Difference]: With dead ends: 650 [2022-01-28 14:52:09,888 INFO L226 Difference]: Without dead ends: 635 [2022-01-28 14:52:09,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:09,888 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:09,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 187 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 553 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-01-28 14:52:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-28 14:52:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 430. [2022-01-28 14:52:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2022-01-28 14:52:09,894 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 20 [2022-01-28 14:52:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:09,894 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2022-01-28 14:52:09,894 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) [2022-01-28 14:52:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2022-01-28 14:52:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:09,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:09,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:09,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:10,095 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 [2022-01-28 14:52:10,095 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:10,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1142353917, now seen corresponding path program 127 times [2022-01-28 14:52:10,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:10,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456802544] [2022-01-28 14:52:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:10,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:10,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:10,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456802544] [2022-01-28 14:52:10,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456802544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:10,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258944671] [2022-01-28 14:52:10,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:10,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:10,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:10,239 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) [2022-01-28 14:52:10,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-28 14:52:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:10,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:10,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:10,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:10,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:10,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:10,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:10,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:10,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:10,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:10,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:10,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:10,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:10,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:10,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:10,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:10,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258944671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:10,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:10,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:10,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148848507] [2022-01-28 14:52:10,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:10,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:10,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:10,688 INFO L87 Difference]: Start difference. First operand 430 states and 1334 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) [2022-01-28 14:52:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:10,979 INFO L93 Difference]: Finished difference Result 640 states and 1912 transitions. [2022-01-28 14:52:10,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:52:10,979 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 [2022-01-28 14:52:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:10,980 INFO L225 Difference]: With dead ends: 640 [2022-01-28 14:52:10,980 INFO L226 Difference]: Without dead ends: 625 [2022-01-28 14:52:10,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:10,980 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:10,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 197 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 588 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-01-28 14:52:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-28 14:52:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 429. [2022-01-28 14:52:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.1051401869158877) internal successors, (1329), 428 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1329 transitions. [2022-01-28 14:52:10,986 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1329 transitions. Word has length 20 [2022-01-28 14:52:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:10,986 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1329 transitions. [2022-01-28 14:52:10,986 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) [2022-01-28 14:52:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1329 transitions. [2022-01-28 14:52:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:10,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:10,987 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] [2022-01-28 14:52:11,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-28 14:52:11,187 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 [2022-01-28 14:52:11,187 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash -864803033, now seen corresponding path program 128 times [2022-01-28 14:52:11,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:11,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682238610] [2022-01-28 14:52:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:11,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:11,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:11,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682238610] [2022-01-28 14:52:11,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682238610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:11,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269597730] [2022-01-28 14:52:11,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:11,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:11,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:11,317 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) [2022-01-28 14:52:11,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-28 14:52:11,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:11,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:11,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:11,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:11,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:11,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:11,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:11,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:11,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:11,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:11,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:11,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:11,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:11,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:11,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:11,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269597730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:11,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:11,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:11,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471007098] [2022-01-28 14:52:11,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:11,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:11,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:11,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:11,767 INFO L87 Difference]: Start difference. First operand 429 states and 1329 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) [2022-01-28 14:52:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:11,996 INFO L93 Difference]: Finished difference Result 583 states and 1761 transitions. [2022-01-28 14:52:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:52:11,996 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 [2022-01-28 14:52:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:11,997 INFO L225 Difference]: With dead ends: 583 [2022-01-28 14:52:11,997 INFO L226 Difference]: Without dead ends: 568 [2022-01-28 14:52:11,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:11,997 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:11,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 144 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 481 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-01-28 14:52:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-28 14:52:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 432. [2022-01-28 14:52:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1113689095127612) internal successors, (1341), 431 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1341 transitions. [2022-01-28 14:52:12,003 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1341 transitions. Word has length 20 [2022-01-28 14:52:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:12,003 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1341 transitions. [2022-01-28 14:52:12,003 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) [2022-01-28 14:52:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1341 transitions. [2022-01-28 14:52:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:12,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:12,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:12,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-01-28 14:52:12,204 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 [2022-01-28 14:52:12,204 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:12,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1906357179, now seen corresponding path program 129 times [2022-01-28 14:52:12,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:12,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241766667] [2022-01-28 14:52:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:12,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:12,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241766667] [2022-01-28 14:52:12,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241766667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46140306] [2022-01-28 14:52:12,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:12,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:12,345 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) [2022-01-28 14:52:12,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-28 14:52:12,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:52:12,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:12,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:12,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:12,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:12,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:12,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:12,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:12,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:12,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:12,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:12,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:12,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:12,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:12,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:12,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:12,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46140306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:12,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:12,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:12,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325869121] [2022-01-28 14:52:12,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:12,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:12,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:12,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:12,810 INFO L87 Difference]: Start difference. First operand 432 states and 1341 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) [2022-01-28 14:52:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:13,078 INFO L93 Difference]: Finished difference Result 609 states and 1825 transitions. [2022-01-28 14:52:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:13,078 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 [2022-01-28 14:52:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:13,079 INFO L225 Difference]: With dead ends: 609 [2022-01-28 14:52:13,079 INFO L226 Difference]: Without dead ends: 594 [2022-01-28 14:52:13,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:13,080 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:13,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 200 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 626 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-01-28 14:52:13,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-28 14:52:13,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 431. [2022-01-28 14:52:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.116279069767442) internal successors, (1340), 430 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1340 transitions. [2022-01-28 14:52:13,087 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1340 transitions. Word has length 20 [2022-01-28 14:52:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:13,087 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1340 transitions. [2022-01-28 14:52:13,087 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) [2022-01-28 14:52:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1340 transitions. [2022-01-28 14:52:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:13,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:13,088 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] [2022-01-28 14:52:13,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:13,310 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 [2022-01-28 14:52:13,310 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:13,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2119735025, now seen corresponding path program 130 times [2022-01-28 14:52:13,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:13,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611271213] [2022-01-28 14:52:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:13,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:13,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611271213] [2022-01-28 14:52:13,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611271213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538862213] [2022-01-28 14:52:13,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:13,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:13,429 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) [2022-01-28 14:52:13,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-28 14:52:13,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:13,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:13,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:13,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:13,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:13,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:13,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:13,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:13,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:13,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:13,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:13,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:13,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:13,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:13,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:13,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538862213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:13,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:13,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:13,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053115112] [2022-01-28 14:52:13,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:13,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:13,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:13,965 INFO L87 Difference]: Start difference. First operand 431 states and 1340 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) [2022-01-28 14:52:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:14,223 INFO L93 Difference]: Finished difference Result 665 states and 1954 transitions. [2022-01-28 14:52:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:14,224 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 [2022-01-28 14:52:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:14,225 INFO L225 Difference]: With dead ends: 665 [2022-01-28 14:52:14,225 INFO L226 Difference]: Without dead ends: 635 [2022-01-28 14:52:14,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:14,225 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:14,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 187 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 528 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-01-28 14:52:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-28 14:52:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 438. [2022-01-28 14:52:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.1075514874141876) internal successors, (1358), 437 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1358 transitions. [2022-01-28 14:52:14,231 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1358 transitions. Word has length 20 [2022-01-28 14:52:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:14,231 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1358 transitions. [2022-01-28 14:52:14,231 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) [2022-01-28 14:52:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1358 transitions. [2022-01-28 14:52:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:14,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:14,231 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] [2022-01-28 14:52:14,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:14,432 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 [2022-01-28 14:52:14,432 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2032454369, now seen corresponding path program 131 times [2022-01-28 14:52:14,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:14,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504338571] [2022-01-28 14:52:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:14,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:14,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:14,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504338571] [2022-01-28 14:52:14,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504338571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:14,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752573074] [2022-01-28 14:52:14,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:14,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:14,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:14,552 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) [2022-01-28 14:52:14,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-28 14:52:14,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:52:14,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:14,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:14,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:14,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:14,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:14,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:14,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:14,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:14,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:14,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:14,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:15,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:15,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:15,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752573074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:15,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:15,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:15,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99045984] [2022-01-28 14:52:15,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:15,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:15,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:15,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:15,086 INFO L87 Difference]: Start difference. First operand 438 states and 1358 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) [2022-01-28 14:52:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:15,303 INFO L93 Difference]: Finished difference Result 627 states and 1855 transitions. [2022-01-28 14:52:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:15,303 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 [2022-01-28 14:52:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:15,304 INFO L225 Difference]: With dead ends: 627 [2022-01-28 14:52:15,304 INFO L226 Difference]: Without dead ends: 621 [2022-01-28 14:52:15,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:15,304 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:15,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 149 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 407 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-01-28 14:52:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-28 14:52:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 426. [2022-01-28 14:52:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1058823529411765) internal successors, (1320), 425 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) [2022-01-28 14:52:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1320 transitions. [2022-01-28 14:52:15,309 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1320 transitions. Word has length 20 [2022-01-28 14:52:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:15,310 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1320 transitions. [2022-01-28 14:52:15,310 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) [2022-01-28 14:52:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1320 transitions. [2022-01-28 14:52:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:15,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:15,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:15,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-28 14:52:15,510 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 [2022-01-28 14:52:15,511 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:15,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:15,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1526566391, now seen corresponding path program 132 times [2022-01-28 14:52:15,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:15,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291617007] [2022-01-28 14:52:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:15,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:15,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:15,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291617007] [2022-01-28 14:52:15,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291617007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:15,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177773398] [2022-01-28 14:52:15,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:15,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:15,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:15,672 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) [2022-01-28 14:52:15,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-28 14:52:15,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:52:15,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:15,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:15,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:15,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:15,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:15,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:15,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:15,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:15,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:15,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:15,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:16,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:16,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:16,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:16,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:16,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177773398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:16,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:16,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:16,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042977447] [2022-01-28 14:52:16,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:16,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:16,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:16,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:16,161 INFO L87 Difference]: Start difference. First operand 426 states and 1320 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) [2022-01-28 14:52:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:16,407 INFO L93 Difference]: Finished difference Result 613 states and 1861 transitions. [2022-01-28 14:52:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:52:16,407 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 [2022-01-28 14:52:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:16,408 INFO L225 Difference]: With dead ends: 613 [2022-01-28 14:52:16,408 INFO L226 Difference]: Without dead ends: 598 [2022-01-28 14:52:16,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:16,408 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:16,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 158 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 478 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-01-28 14:52:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-28 14:52:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 426. [2022-01-28 14:52:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1058823529411765) internal successors, (1320), 425 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) [2022-01-28 14:52:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1320 transitions. [2022-01-28 14:52:16,414 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1320 transitions. Word has length 20 [2022-01-28 14:52:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:16,414 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1320 transitions. [2022-01-28 14:52:16,414 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) [2022-01-28 14:52:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1320 transitions. [2022-01-28 14:52:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:16,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:16,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:16,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-28 14:52:16,615 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 [2022-01-28 14:52:16,615 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:16,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:16,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1991516649, now seen corresponding path program 133 times [2022-01-28 14:52:16,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:16,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741554705] [2022-01-28 14:52:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:16,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:16,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:16,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741554705] [2022-01-28 14:52:16,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741554705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:16,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021127878] [2022-01-28 14:52:16,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:16,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:16,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:16,776 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) [2022-01-28 14:52:16,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-28 14:52:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:16,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:16,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:16,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:16,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:16,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:16,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:17,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:17,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:17,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:17,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:17,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:17,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:17,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:17,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021127878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:17,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:17,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:17,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565063509] [2022-01-28 14:52:17,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:17,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:17,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:17,266 INFO L87 Difference]: Start difference. First operand 426 states and 1320 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) [2022-01-28 14:52:17,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:17,559 INFO L93 Difference]: Finished difference Result 677 states and 2030 transitions. [2022-01-28 14:52:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:17,559 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 [2022-01-28 14:52:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:17,560 INFO L225 Difference]: With dead ends: 677 [2022-01-28 14:52:17,560 INFO L226 Difference]: Without dead ends: 662 [2022-01-28 14:52:17,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:52:17,561 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:17,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 177 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 496 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-28 14:52:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-28 14:52:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 424. [2022-01-28 14:52:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1087470449172576) internal successors, (1315), 423 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1315 transitions. [2022-01-28 14:52:17,566 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1315 transitions. Word has length 20 [2022-01-28 14:52:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:17,566 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1315 transitions. [2022-01-28 14:52:17,566 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) [2022-01-28 14:52:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1315 transitions. [2022-01-28 14:52:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:17,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:17,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:17,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-28 14:52:17,767 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 [2022-01-28 14:52:17,767 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash 770911021, now seen corresponding path program 134 times [2022-01-28 14:52:17,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181790644] [2022-01-28 14:52:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:17,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:17,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:17,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181790644] [2022-01-28 14:52:17,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181790644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851234214] [2022-01-28 14:52:17,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:17,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:17,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:17,909 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) [2022-01-28 14:52:17,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-28 14:52:17,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:17,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:17,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:17,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:18,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:18,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:18,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:18,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:18,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:18,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:18,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:18,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:18,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:18,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:18,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851234214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:18,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:18,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:18,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941051621] [2022-01-28 14:52:18,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:18,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:18,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:18,379 INFO L87 Difference]: Start difference. First operand 424 states and 1315 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) [2022-01-28 14:52:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:18,766 INFO L93 Difference]: Finished difference Result 711 states and 2110 transitions. [2022-01-28 14:52:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:52:18,767 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 [2022-01-28 14:52:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:18,768 INFO L225 Difference]: With dead ends: 711 [2022-01-28 14:52:18,768 INFO L226 Difference]: Without dead ends: 681 [2022-01-28 14:52:18,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:52:18,768 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:18,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 223 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-28 14:52:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 424. [2022-01-28 14:52:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.1087470449172576) internal successors, (1315), 423 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1315 transitions. [2022-01-28 14:52:18,774 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1315 transitions. Word has length 20 [2022-01-28 14:52:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:18,774 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1315 transitions. [2022-01-28 14:52:18,774 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) [2022-01-28 14:52:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1315 transitions. [2022-01-28 14:52:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:18,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:18,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:18,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-28 14:52:18,975 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 [2022-01-28 14:52:18,975 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1276443923, now seen corresponding path program 135 times [2022-01-28 14:52:18,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:18,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653243146] [2022-01-28 14:52:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:18,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:19,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653243146] [2022-01-28 14:52:19,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653243146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683280680] [2022-01-28 14:52:19,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:19,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:19,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:19,133 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) [2022-01-28 14:52:19,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-28 14:52:19,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:52:19,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:19,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:52:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:19,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:19,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:19,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:19,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:19,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:19,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:19,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:19,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:19,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:19,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:19,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:19,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:19,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683280680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:19,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:19,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:19,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850646152] [2022-01-28 14:52:19,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:19,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:19,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:19,766 INFO L87 Difference]: Start difference. First operand 424 states and 1315 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) [2022-01-28 14:52:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:20,303 INFO L93 Difference]: Finished difference Result 779 states and 2324 transitions. [2022-01-28 14:52:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:52:20,303 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 [2022-01-28 14:52:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:20,304 INFO L225 Difference]: With dead ends: 779 [2022-01-28 14:52:20,304 INFO L226 Difference]: Without dead ends: 749 [2022-01-28 14:52:20,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:52:20,304 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:20,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 225 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-28 14:52:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 428. [2022-01-28 14:52:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.117096018735363) internal successors, (1331), 427 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1331 transitions. [2022-01-28 14:52:20,310 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1331 transitions. Word has length 20 [2022-01-28 14:52:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:20,310 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1331 transitions. [2022-01-28 14:52:20,310 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) [2022-01-28 14:52:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1331 transitions. [2022-01-28 14:52:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:20,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:20,311 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] [2022-01-28 14:52:20,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:20,511 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 [2022-01-28 14:52:20,512 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1299345011, now seen corresponding path program 136 times [2022-01-28 14:52:20,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:20,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162581471] [2022-01-28 14:52:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:20,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:20,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162581471] [2022-01-28 14:52:20,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162581471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:20,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740709516] [2022-01-28 14:52:20,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:20,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:20,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:20,688 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) [2022-01-28 14:52:20,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-28 14:52:20,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:20,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:20,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:20,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:20,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:20,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:20,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:20,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:20,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:20,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:21,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:21,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:21,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:21,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:21,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:21,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:21,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740709516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:21,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:21,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:21,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029220480] [2022-01-28 14:52:21,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:21,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:21,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:21,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:21,171 INFO L87 Difference]: Start difference. First operand 428 states and 1331 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) [2022-01-28 14:52:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:21,418 INFO L93 Difference]: Finished difference Result 631 states and 1914 transitions. [2022-01-28 14:52:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:21,418 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 [2022-01-28 14:52:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:21,419 INFO L225 Difference]: With dead ends: 631 [2022-01-28 14:52:21,419 INFO L226 Difference]: Without dead ends: 616 [2022-01-28 14:52:21,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:21,419 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:21,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 186 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 482 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-01-28 14:52:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-28 14:52:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 429. [2022-01-28 14:52:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.121495327102804) internal successors, (1336), 428 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1336 transitions. [2022-01-28 14:52:21,425 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1336 transitions. Word has length 20 [2022-01-28 14:52:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:21,425 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1336 transitions. [2022-01-28 14:52:21,425 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) [2022-01-28 14:52:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1336 transitions. [2022-01-28 14:52:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:21,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:21,425 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] [2022-01-28 14:52:21,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-28 14:52:21,626 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 [2022-01-28 14:52:21,627 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:21,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2076229267, now seen corresponding path program 137 times [2022-01-28 14:52:21,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:21,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081096587] [2022-01-28 14:52:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:21,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:21,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081096587] [2022-01-28 14:52:21,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081096587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824348967] [2022-01-28 14:52:21,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:21,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:21,768 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) [2022-01-28 14:52:21,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-28 14:52:21,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:21,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:21,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:21,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:21,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:21,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:21,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:22,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:22,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:22,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:22,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:22,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:22,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:22,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:22,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824348967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:22,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:22,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:22,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510268274] [2022-01-28 14:52:22,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:22,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:22,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:22,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:22,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:22,276 INFO L87 Difference]: Start difference. First operand 429 states and 1336 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) [2022-01-28 14:52:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:22,594 INFO L93 Difference]: Finished difference Result 691 states and 2069 transitions. [2022-01-28 14:52:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:52:22,594 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 [2022-01-28 14:52:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:22,595 INFO L225 Difference]: With dead ends: 691 [2022-01-28 14:52:22,595 INFO L226 Difference]: Without dead ends: 676 [2022-01-28 14:52:22,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:52:22,596 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:22,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 201 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 576 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2022-01-28 14:52:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-01-28 14:52:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 429. [2022-01-28 14:52:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.121495327102804) internal successors, (1336), 428 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1336 transitions. [2022-01-28 14:52:22,601 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1336 transitions. Word has length 20 [2022-01-28 14:52:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:22,601 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1336 transitions. [2022-01-28 14:52:22,601 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) [2022-01-28 14:52:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1336 transitions. [2022-01-28 14:52:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:22,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:22,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:22,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-28 14:52:22,802 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 [2022-01-28 14:52:22,802 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash -703239095, now seen corresponding path program 138 times [2022-01-28 14:52:22,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:22,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835162599] [2022-01-28 14:52:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:22,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:22,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835162599] [2022-01-28 14:52:22,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835162599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973966076] [2022-01-28 14:52:22,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:22,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:22,917 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) [2022-01-28 14:52:22,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-28 14:52:22,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:52:22,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:22,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:23,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:23,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:23,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:23,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:23,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:23,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:23,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:23,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:23,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:23,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:23,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:23,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:23,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973966076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:23,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:23,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:52:23,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849154854] [2022-01-28 14:52:23,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:23,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:52:23,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:23,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:52:23,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:52:23,328 INFO L87 Difference]: Start difference. First operand 429 states and 1336 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) [2022-01-28 14:52:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:23,579 INFO L93 Difference]: Finished difference Result 593 states and 1812 transitions. [2022-01-28 14:52:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:52:23,580 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 [2022-01-28 14:52:23,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:23,580 INFO L225 Difference]: With dead ends: 593 [2022-01-28 14:52:23,581 INFO L226 Difference]: Without dead ends: 578 [2022-01-28 14:52:23,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:23,581 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:23,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 178 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 516 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-01-28 14:52:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-28 14:52:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 429. [2022-01-28 14:52:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.121495327102804) internal successors, (1336), 428 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1336 transitions. [2022-01-28 14:52:23,586 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1336 transitions. Word has length 20 [2022-01-28 14:52:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:23,586 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1336 transitions. [2022-01-28 14:52:23,586 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) [2022-01-28 14:52:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1336 transitions. [2022-01-28 14:52:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:23,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:23,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:23,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-28 14:52:23,787 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 [2022-01-28 14:52:23,787 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash -177738455, now seen corresponding path program 139 times [2022-01-28 14:52:23,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:23,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653127935] [2022-01-28 14:52:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:23,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:23,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:23,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653127935] [2022-01-28 14:52:23,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653127935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:23,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127744920] [2022-01-28 14:52:23,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:23,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:23,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:23,928 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) [2022-01-28 14:52:23,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-28 14:52:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:23,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:23,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:24,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:24,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:24,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:24,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:24,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:24,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:24,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:24,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:24,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:24,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:24,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:24,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:24,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127744920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:24,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:24,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:24,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972144959] [2022-01-28 14:52:24,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:24,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:24,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:24,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:24,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:24,419 INFO L87 Difference]: Start difference. First operand 429 states and 1336 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) [2022-01-28 14:52:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:24,718 INFO L93 Difference]: Finished difference Result 691 states and 2062 transitions. [2022-01-28 14:52:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:52:24,718 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 [2022-01-28 14:52:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:24,719 INFO L225 Difference]: With dead ends: 691 [2022-01-28 14:52:24,719 INFO L226 Difference]: Without dead ends: 676 [2022-01-28 14:52:24,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:52:24,719 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:24,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 192 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 545 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-28 14:52:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-01-28 14:52:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 429. [2022-01-28 14:52:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.121495327102804) internal successors, (1336), 428 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1336 transitions. [2022-01-28 14:52:24,725 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1336 transitions. Word has length 20 [2022-01-28 14:52:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:24,725 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1336 transitions. [2022-01-28 14:52:24,725 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) [2022-01-28 14:52:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1336 transitions. [2022-01-28 14:52:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:24,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:24,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:24,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-28 14:52:24,928 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 [2022-01-28 14:52:24,928 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 811322093, now seen corresponding path program 140 times [2022-01-28 14:52:24,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:24,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377769222] [2022-01-28 14:52:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:24,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:25,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:25,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377769222] [2022-01-28 14:52:25,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377769222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:25,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107623620] [2022-01-28 14:52:25,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:25,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:25,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:25,040 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) [2022-01-28 14:52:25,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-28 14:52:25,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:25,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:25,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:25,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:25,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:25,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:25,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:25,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:25,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:25,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:25,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:25,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:25,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:25,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:25,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107623620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:25,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:25,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:52:25,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683063910] [2022-01-28 14:52:25,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:25,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:52:25,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:25,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:52:25,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:52:25,485 INFO L87 Difference]: Start difference. First operand 429 states and 1336 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) [2022-01-28 14:52:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:25,726 INFO L93 Difference]: Finished difference Result 640 states and 1926 transitions. [2022-01-28 14:52:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:52:25,726 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 [2022-01-28 14:52:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:25,727 INFO L225 Difference]: With dead ends: 640 [2022-01-28 14:52:25,727 INFO L226 Difference]: Without dead ends: 625 [2022-01-28 14:52:25,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:25,728 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:25,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 145 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 447 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-01-28 14:52:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-28 14:52:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 428. [2022-01-28 14:52:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.117096018735363) internal successors, (1331), 427 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1331 transitions. [2022-01-28 14:52:25,733 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1331 transitions. Word has length 20 [2022-01-28 14:52:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:25,733 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1331 transitions. [2022-01-28 14:52:25,733 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) [2022-01-28 14:52:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1331 transitions. [2022-01-28 14:52:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:25,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:25,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:25,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-28 14:52:25,934 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 [2022-01-28 14:52:25,934 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:25,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1614655713, now seen corresponding path program 141 times [2022-01-28 14:52:25,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:25,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236876613] [2022-01-28 14:52:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:25,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:26,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:26,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236876613] [2022-01-28 14:52:26,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236876613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:26,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272203783] [2022-01-28 14:52:26,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:26,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:26,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:26,068 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) [2022-01-28 14:52:26,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-28 14:52:26,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:52:26,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:26,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:26,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:26,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:26,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:26,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:26,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:26,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:26,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:26,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:26,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:26,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:26,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:26,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:26,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:26,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:26,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272203783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:26,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:26,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:26,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895923426] [2022-01-28 14:52:26,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:26,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:26,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:26,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:26,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:26,567 INFO L87 Difference]: Start difference. First operand 428 states and 1331 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) [2022-01-28 14:52:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:26,867 INFO L93 Difference]: Finished difference Result 675 states and 2020 transitions. [2022-01-28 14:52:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:26,867 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 [2022-01-28 14:52:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:26,868 INFO L225 Difference]: With dead ends: 675 [2022-01-28 14:52:26,868 INFO L226 Difference]: Without dead ends: 645 [2022-01-28 14:52:26,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:26,869 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:26,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 224 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 643 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-01-28 14:52:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-28 14:52:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 435. [2022-01-28 14:52:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1244239631336406) internal successors, (1356), 434 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) [2022-01-28 14:52:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1356 transitions. [2022-01-28 14:52:26,874 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1356 transitions. Word has length 20 [2022-01-28 14:52:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:26,875 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1356 transitions. [2022-01-28 14:52:26,875 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) [2022-01-28 14:52:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1356 transitions. [2022-01-28 14:52:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:26,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:26,875 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:26,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-28 14:52:27,076 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 [2022-01-28 14:52:27,076 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:27,076 INFO L85 PathProgramCache]: Analyzing trace with hash -692953573, now seen corresponding path program 142 times [2022-01-28 14:52:27,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:27,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200746102] [2022-01-28 14:52:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:27,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:27,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:27,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200746102] [2022-01-28 14:52:27,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200746102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:27,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51197718] [2022-01-28 14:52:27,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:27,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:27,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:27,214 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) [2022-01-28 14:52:27,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-28 14:52:27,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:27,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:27,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:27,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:27,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:27,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:27,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:27,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:27,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:27,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:27,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:27,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:27,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:27,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:27,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:27,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51197718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:27,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:27,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:27,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762456914] [2022-01-28 14:52:27,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:27,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:27,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:27,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:27,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:27,722 INFO L87 Difference]: Start difference. First operand 435 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) [2022-01-28 14:52:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:27,935 INFO L93 Difference]: Finished difference Result 631 states and 1896 transitions. [2022-01-28 14:52:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:52:27,935 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 [2022-01-28 14:52:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:27,936 INFO L225 Difference]: With dead ends: 631 [2022-01-28 14:52:27,936 INFO L226 Difference]: Without dead ends: 616 [2022-01-28 14:52:27,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:27,936 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:27,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 250 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 512 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-01-28 14:52:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-28 14:52:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 435. [2022-01-28 14:52:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1244239631336406) internal successors, (1356), 434 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) [2022-01-28 14:52:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1356 transitions. [2022-01-28 14:52:27,944 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1356 transitions. Word has length 20 [2022-01-28 14:52:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:27,944 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1356 transitions. [2022-01-28 14:52:27,944 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) [2022-01-28 14:52:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1356 transitions. [2022-01-28 14:52:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:27,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:27,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:27,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:28,167 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 [2022-01-28 14:52:28,167 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1446337189, now seen corresponding path program 143 times [2022-01-28 14:52:28,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:28,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521065241] [2022-01-28 14:52:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:28,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:28,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:28,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521065241] [2022-01-28 14:52:28,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521065241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:28,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232349695] [2022-01-28 14:52:28,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:28,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:28,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:28,306 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) [2022-01-28 14:52:28,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-28 14:52:28,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:28,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:28,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:28,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:28,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:28,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:28,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:28,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:28,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:28,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:28,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:28,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:28,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:28,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:28,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:28,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:28,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:28,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232349695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:28,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:28,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:28,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909140880] [2022-01-28 14:52:28,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:28,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:28,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:28,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:28,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:28,811 INFO L87 Difference]: Start difference. First operand 435 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) [2022-01-28 14:52:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:29,116 INFO L93 Difference]: Finished difference Result 650 states and 1959 transitions. [2022-01-28 14:52:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:29,117 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 [2022-01-28 14:52:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:29,118 INFO L225 Difference]: With dead ends: 650 [2022-01-28 14:52:29,118 INFO L226 Difference]: Without dead ends: 643 [2022-01-28 14:52:29,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:29,118 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:29,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 241 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 633 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-01-28 14:52:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-28 14:52:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 432. [2022-01-28 14:52:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1160092807424595) internal successors, (1343), 431 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) [2022-01-28 14:52:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1343 transitions. [2022-01-28 14:52:29,124 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1343 transitions. Word has length 20 [2022-01-28 14:52:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:29,124 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1343 transitions. [2022-01-28 14:52:29,124 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) [2022-01-28 14:52:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1343 transitions. [2022-01-28 14:52:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:29,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:29,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:29,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-28 14:52:29,325 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 [2022-01-28 14:52:29,325 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:29,325 INFO L85 PathProgramCache]: Analyzing trace with hash 632956639, now seen corresponding path program 144 times [2022-01-28 14:52:29,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:29,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671888750] [2022-01-28 14:52:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:29,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:29,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:29,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671888750] [2022-01-28 14:52:29,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671888750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:29,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31974318] [2022-01-28 14:52:29,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:29,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:29,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:29,496 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) [2022-01-28 14:52:29,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-28 14:52:29,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:52:29,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:29,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:29,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:29,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:29,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:29,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:29,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:29,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:29,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:29,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:29,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:29,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:29,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:29,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:29,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:29,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:30,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31974318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:30,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:30,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:30,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912022195] [2022-01-28 14:52:30,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:30,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:30,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:30,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:30,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:30,042 INFO L87 Difference]: Start difference. First operand 432 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) [2022-01-28 14:52:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:30,347 INFO L93 Difference]: Finished difference Result 661 states and 1987 transitions. [2022-01-28 14:52:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:52:30,347 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 [2022-01-28 14:52:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:30,348 INFO L225 Difference]: With dead ends: 661 [2022-01-28 14:52:30,348 INFO L226 Difference]: Without dead ends: 631 [2022-01-28 14:52:30,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:30,348 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:30,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 218 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 603 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-01-28 14:52:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-28 14:52:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 432. [2022-01-28 14:52:30,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1160092807424595) internal successors, (1343), 431 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) [2022-01-28 14:52:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1343 transitions. [2022-01-28 14:52:30,354 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1343 transitions. Word has length 20 [2022-01-28 14:52:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:30,354 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1343 transitions. [2022-01-28 14:52:30,354 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) [2022-01-28 14:52:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1343 transitions. [2022-01-28 14:52:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:30,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:30,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:30,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-28 14:52:30,555 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 [2022-01-28 14:52:30,555 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1348108309, now seen corresponding path program 145 times [2022-01-28 14:52:30,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:30,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306610702] [2022-01-28 14:52:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:30,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:30,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306610702] [2022-01-28 14:52:30,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306610702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975434795] [2022-01-28 14:52:30,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:30,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:30,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:30,669 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) [2022-01-28 14:52:30,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-28 14:52:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:30,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:30,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:30,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:30,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:30,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:30,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:30,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:30,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:30,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:30,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:30,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:31,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:31,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:31,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:31,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:31,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975434795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:31,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:31,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:52:31,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132802674] [2022-01-28 14:52:31,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:31,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:52:31,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:31,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:52:31,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:52:31,103 INFO L87 Difference]: Start difference. First operand 432 states and 1343 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) [2022-01-28 14:52:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:31,257 INFO L93 Difference]: Finished difference Result 578 states and 1752 transitions. [2022-01-28 14:52:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:52:31,257 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 [2022-01-28 14:52:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:31,258 INFO L225 Difference]: With dead ends: 578 [2022-01-28 14:52:31,258 INFO L226 Difference]: Without dead ends: 548 [2022-01-28 14:52:31,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:52:31,259 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:31,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 99 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 337 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-01-28 14:52:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-28 14:52:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 436. [2022-01-28 14:52:31,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.1241379310344826) internal successors, (1359), 435 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1359 transitions. [2022-01-28 14:52:31,264 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1359 transitions. Word has length 20 [2022-01-28 14:52:31,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:31,264 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1359 transitions. [2022-01-28 14:52:31,264 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) [2022-01-28 14:52:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1359 transitions. [2022-01-28 14:52:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:31,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:31,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:31,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-28 14:52:31,465 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 [2022-01-28 14:52:31,465 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:31,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1935023911, now seen corresponding path program 146 times [2022-01-28 14:52:31,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:31,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880364283] [2022-01-28 14:52:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:31,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:31,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:31,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880364283] [2022-01-28 14:52:31,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880364283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:31,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590550456] [2022-01-28 14:52:31,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:31,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:31,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:31,608 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) [2022-01-28 14:52:31,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-28 14:52:31,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:31,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:31,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:31,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:31,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:31,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:31,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:31,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:31,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:31,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:31,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:31,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:31,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:32,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:32,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:32,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:32,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:32,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590550456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:32,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:32,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:32,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675818199] [2022-01-28 14:52:32,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:32,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:32,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:32,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:32,113 INFO L87 Difference]: Start difference. First operand 436 states and 1359 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) [2022-01-28 14:52:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:32,394 INFO L93 Difference]: Finished difference Result 649 states and 1927 transitions. [2022-01-28 14:52:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:32,394 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 [2022-01-28 14:52:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:32,395 INFO L225 Difference]: With dead ends: 649 [2022-01-28 14:52:32,395 INFO L226 Difference]: Without dead ends: 619 [2022-01-28 14:52:32,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:32,396 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:32,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 217 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 668 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-28 14:52:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-28 14:52:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 432. [2022-01-28 14:52:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.125290023201856) internal successors, (1347), 431 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1347 transitions. [2022-01-28 14:52:32,401 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1347 transitions. Word has length 20 [2022-01-28 14:52:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:32,401 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1347 transitions. [2022-01-28 14:52:32,401 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) [2022-01-28 14:52:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1347 transitions. [2022-01-28 14:52:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:32,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:32,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:32,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-28 14:52:32,602 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 [2022-01-28 14:52:32,602 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash -810241379, now seen corresponding path program 147 times [2022-01-28 14:52:32,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:32,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806699300] [2022-01-28 14:52:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:32,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:32,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:32,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806699300] [2022-01-28 14:52:32,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806699300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:32,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669515555] [2022-01-28 14:52:32,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:32,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:32,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:32,726 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) [2022-01-28 14:52:32,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-28 14:52:32,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:52:32,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:32,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:32,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:32,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:32,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:32,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:32,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:33,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:33,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:33,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:33,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:33,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:33,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:33,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669515555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:33,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:33,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:33,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373946473] [2022-01-28 14:52:33,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:33,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:33,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:33,173 INFO L87 Difference]: Start difference. First operand 432 states and 1347 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) [2022-01-28 14:52:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:33,455 INFO L93 Difference]: Finished difference Result 629 states and 1892 transitions. [2022-01-28 14:52:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:33,461 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 [2022-01-28 14:52:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:33,462 INFO L225 Difference]: With dead ends: 629 [2022-01-28 14:52:33,462 INFO L226 Difference]: Without dead ends: 614 [2022-01-28 14:52:33,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:33,462 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:33,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 215 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 668 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-01-28 14:52:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-28 14:52:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 435. [2022-01-28 14:52:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.129032258064516) internal successors, (1358), 434 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1358 transitions. [2022-01-28 14:52:33,467 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1358 transitions. Word has length 20 [2022-01-28 14:52:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:33,467 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1358 transitions. [2022-01-28 14:52:33,467 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) [2022-01-28 14:52:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1358 transitions. [2022-01-28 14:52:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:33,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:33,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:33,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-28 14:52:33,668 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 [2022-01-28 14:52:33,668 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash -541366287, now seen corresponding path program 148 times [2022-01-28 14:52:33,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:33,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721945934] [2022-01-28 14:52:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:33,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:33,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:33,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721945934] [2022-01-28 14:52:33,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721945934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:33,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729287847] [2022-01-28 14:52:33,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:33,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:33,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:33,789 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) [2022-01-28 14:52:33,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-28 14:52:33,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:33,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:33,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:33,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:33,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:34,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:34,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:34,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:34,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:34,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:34,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:34,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:34,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:34,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:34,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:34,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:34,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729287847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:34,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:34,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:34,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170001847] [2022-01-28 14:52:34,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:34,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:34,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:34,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:34,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:34,275 INFO L87 Difference]: Start difference. First operand 435 states and 1358 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) [2022-01-28 14:52:34,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:34,523 INFO L93 Difference]: Finished difference Result 669 states and 1971 transitions. [2022-01-28 14:52:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:34,523 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 [2022-01-28 14:52:34,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:34,524 INFO L225 Difference]: With dead ends: 669 [2022-01-28 14:52:34,524 INFO L226 Difference]: Without dead ends: 639 [2022-01-28 14:52:34,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:34,524 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:34,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 165 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 510 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-01-28 14:52:34,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-28 14:52:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 441. [2022-01-28 14:52:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.118181818181818) internal successors, (1372), 440 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) [2022-01-28 14:52:34,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1372 transitions. [2022-01-28 14:52:34,531 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1372 transitions. Word has length 20 [2022-01-28 14:52:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:34,531 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1372 transitions. [2022-01-28 14:52:34,531 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) [2022-01-28 14:52:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1372 transitions. [2022-01-28 14:52:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:34,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:34,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:34,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-28 14:52:34,732 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 [2022-01-28 14:52:34,732 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:34,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1216748215, now seen corresponding path program 149 times [2022-01-28 14:52:34,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:34,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132773377] [2022-01-28 14:52:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:34,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:34,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132773377] [2022-01-28 14:52:34,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132773377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68623007] [2022-01-28 14:52:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:34,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:34,883 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) [2022-01-28 14:52:34,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-28 14:52:34,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:34,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:34,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:34,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:34,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:35,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:35,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:35,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:35,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:35,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:35,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:35,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:35,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:35,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:35,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:35,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:35,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68623007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:35,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:35,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:35,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608917767] [2022-01-28 14:52:35,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:35,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:35,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:35,433 INFO L87 Difference]: Start difference. First operand 441 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) [2022-01-28 14:52:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:35,656 INFO L93 Difference]: Finished difference Result 637 states and 1891 transitions. [2022-01-28 14:52:35,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:35,656 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 [2022-01-28 14:52:35,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:35,657 INFO L225 Difference]: With dead ends: 637 [2022-01-28 14:52:35,657 INFO L226 Difference]: Without dead ends: 631 [2022-01-28 14:52:35,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:35,657 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:35,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 147 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 420 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-01-28 14:52:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-28 14:52:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 428. [2022-01-28 14:52:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.117096018735363) internal successors, (1331), 427 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1331 transitions. [2022-01-28 14:52:35,663 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1331 transitions. Word has length 20 [2022-01-28 14:52:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:35,663 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1331 transitions. [2022-01-28 14:52:35,663 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) [2022-01-28 14:52:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1331 transitions. [2022-01-28 14:52:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:35,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:35,664 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] [2022-01-28 14:52:35,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-28 14:52:35,864 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 [2022-01-28 14:52:35,864 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:35,864 INFO L85 PathProgramCache]: Analyzing trace with hash -450722539, now seen corresponding path program 150 times [2022-01-28 14:52:35,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:35,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303952412] [2022-01-28 14:52:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:35,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:35,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303952412] [2022-01-28 14:52:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303952412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521453466] [2022-01-28 14:52:35,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:35,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:36,000 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) [2022-01-28 14:52:36,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-28 14:52:36,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:52:36,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:36,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:36,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:36,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:36,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:36,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:36,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:36,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:36,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:36,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:36,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:36,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:36,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521453466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:36,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:36,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:36,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398831281] [2022-01-28 14:52:36,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:36,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:36,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:36,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:36,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:36,470 INFO L87 Difference]: Start difference. First operand 428 states and 1331 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) [2022-01-28 14:52:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:36,634 INFO L93 Difference]: Finished difference Result 596 states and 1802 transitions. [2022-01-28 14:52:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:52:36,634 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 [2022-01-28 14:52:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:36,635 INFO L225 Difference]: With dead ends: 596 [2022-01-28 14:52:36,635 INFO L226 Difference]: Without dead ends: 581 [2022-01-28 14:52:36,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:36,635 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:36,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 179 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 366 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-01-28 14:52:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-01-28 14:52:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 432. [2022-01-28 14:52:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.120649651972158) internal successors, (1345), 431 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1345 transitions. [2022-01-28 14:52:36,641 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1345 transitions. Word has length 20 [2022-01-28 14:52:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:36,641 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1345 transitions. [2022-01-28 14:52:36,641 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) [2022-01-28 14:52:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1345 transitions. [2022-01-28 14:52:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:36,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:36,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:36,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-28 14:52:36,842 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 [2022-01-28 14:52:36,842 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1227606795, now seen corresponding path program 151 times [2022-01-28 14:52:36,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:36,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424775267] [2022-01-28 14:52:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:36,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:36,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424775267] [2022-01-28 14:52:36,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424775267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495342916] [2022-01-28 14:52:36,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:36,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:36,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:36,974 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) [2022-01-28 14:52:36,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-28 14:52:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:36,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:36,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:37,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:37,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:37,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:37,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:37,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:37,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:37,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:37,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:37,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:37,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:37,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:37,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:37,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495342916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:37,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:37,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:37,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452628849] [2022-01-28 14:52:37,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:37,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:37,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:37,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:37,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:37,467 INFO L87 Difference]: Start difference. First operand 432 states and 1345 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) [2022-01-28 14:52:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:37,780 INFO L93 Difference]: Finished difference Result 644 states and 1932 transitions. [2022-01-28 14:52:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:37,780 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 [2022-01-28 14:52:37,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:37,781 INFO L225 Difference]: With dead ends: 644 [2022-01-28 14:52:37,781 INFO L226 Difference]: Without dead ends: 629 [2022-01-28 14:52:37,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:37,781 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:37,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 243 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 656 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-28 14:52:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-28 14:52:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 432. [2022-01-28 14:52:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.120649651972158) internal successors, (1345), 431 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1345 transitions. [2022-01-28 14:52:37,787 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1345 transitions. Word has length 20 [2022-01-28 14:52:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:37,787 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1345 transitions. [2022-01-28 14:52:37,787 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) [2022-01-28 14:52:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1345 transitions. [2022-01-28 14:52:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:37,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:37,788 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] [2022-01-28 14:52:37,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-28 14:52:37,988 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 [2022-01-28 14:52:37,988 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash 145383377, now seen corresponding path program 152 times [2022-01-28 14:52:37,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:37,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811950568] [2022-01-28 14:52:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:37,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:38,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:38,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811950568] [2022-01-28 14:52:38,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811950568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:38,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748759509] [2022-01-28 14:52:38,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:38,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:38,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:38,137 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) [2022-01-28 14:52:38,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-28 14:52:38,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:38,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:38,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:38,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:38,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:38,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:38,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:38,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:38,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:38,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:38,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:38,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:38,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:38,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:38,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:38,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:38,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748759509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:38,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:38,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:38,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2209353] [2022-01-28 14:52:38,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:38,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:38,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:38,567 INFO L87 Difference]: Start difference. First operand 432 states and 1345 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) [2022-01-28 14:52:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:38,832 INFO L93 Difference]: Finished difference Result 615 states and 1861 transitions. [2022-01-28 14:52:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:52:38,833 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 [2022-01-28 14:52:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:38,834 INFO L225 Difference]: With dead ends: 615 [2022-01-28 14:52:38,834 INFO L226 Difference]: Without dead ends: 600 [2022-01-28 14:52:38,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:38,834 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:38,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 155 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 496 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-28 14:52:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-28 14:52:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 432. [2022-01-28 14:52:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.120649651972158) internal successors, (1345), 431 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1345 transitions. [2022-01-28 14:52:38,839 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1345 transitions. Word has length 20 [2022-01-28 14:52:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:38,840 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1345 transitions. [2022-01-28 14:52:38,840 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) [2022-01-28 14:52:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1345 transitions. [2022-01-28 14:52:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:38,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:38,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:38,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-01-28 14:52:39,040 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 [2022-01-28 14:52:39,041 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:39,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:39,041 INFO L85 PathProgramCache]: Analyzing trace with hash 670884017, now seen corresponding path program 153 times [2022-01-28 14:52:39,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405509679] [2022-01-28 14:52:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:39,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:39,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:39,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405509679] [2022-01-28 14:52:39,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405509679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:39,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011950237] [2022-01-28 14:52:39,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:39,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:39,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:39,212 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) [2022-01-28 14:52:39,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-28 14:52:39,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:52:39,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:39,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:39,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:39,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:39,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:39,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:39,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:39,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:39,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:39,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:39,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:39,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:39,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:39,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:39,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011950237] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:39,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:39,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:39,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112381785] [2022-01-28 14:52:39,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:39,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:39,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:39,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:39,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:39,729 INFO L87 Difference]: Start difference. First operand 432 states and 1345 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) [2022-01-28 14:52:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:40,028 INFO L93 Difference]: Finished difference Result 653 states and 1949 transitions. [2022-01-28 14:52:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:52:40,029 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 [2022-01-28 14:52:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:40,030 INFO L225 Difference]: With dead ends: 653 [2022-01-28 14:52:40,030 INFO L226 Difference]: Without dead ends: 638 [2022-01-28 14:52:40,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:52:40,030 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:40,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 224 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 640 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-01-28 14:52:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-28 14:52:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 432. [2022-01-28 14:52:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.120649651972158) internal successors, (1345), 431 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1345 transitions. [2022-01-28 14:52:40,036 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1345 transitions. Word has length 20 [2022-01-28 14:52:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:40,036 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1345 transitions. [2022-01-28 14:52:40,036 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) [2022-01-28 14:52:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1345 transitions. [2022-01-28 14:52:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:40,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:40,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:40,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-28 14:52:40,237 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 [2022-01-28 14:52:40,237 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:40,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1659944565, now seen corresponding path program 154 times [2022-01-28 14:52:40,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:40,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819062110] [2022-01-28 14:52:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:40,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:40,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:40,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819062110] [2022-01-28 14:52:40,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819062110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:40,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764313467] [2022-01-28 14:52:40,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:40,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:40,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:40,408 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) [2022-01-28 14:52:40,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-28 14:52:40,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:40,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:40,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:40,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:40,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:40,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:40,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:40,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:40,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:40,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:40,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:40,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:40,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:40,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:40,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:40,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764313467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:40,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:40,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:40,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833271443] [2022-01-28 14:52:40,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:40,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:40,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:40,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:40,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:40,960 INFO L87 Difference]: Start difference. First operand 432 states and 1345 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) [2022-01-28 14:52:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:41,165 INFO L93 Difference]: Finished difference Result 618 states and 1852 transitions. [2022-01-28 14:52:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:52:41,166 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 [2022-01-28 14:52:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:41,167 INFO L225 Difference]: With dead ends: 618 [2022-01-28 14:52:41,167 INFO L226 Difference]: Without dead ends: 603 [2022-01-28 14:52:41,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:41,167 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:41,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 185 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 448 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-01-28 14:52:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-28 14:52:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 431. [2022-01-28 14:52:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.116279069767442) internal successors, (1340), 430 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1340 transitions. [2022-01-28 14:52:41,174 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1340 transitions. Word has length 20 [2022-01-28 14:52:41,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:41,175 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1340 transitions. [2022-01-28 14:52:41,175 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) [2022-01-28 14:52:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1340 transitions. [2022-01-28 14:52:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:41,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:41,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:41,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:41,391 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 [2022-01-28 14:52:41,391 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:41,392 INFO L85 PathProgramCache]: Analyzing trace with hash -347212385, now seen corresponding path program 155 times [2022-01-28 14:52:41,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:41,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144721584] [2022-01-28 14:52:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:41,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:41,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144721584] [2022-01-28 14:52:41,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144721584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534580076] [2022-01-28 14:52:41,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:41,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:41,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:41,522 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) [2022-01-28 14:52:41,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-28 14:52:41,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:52:41,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:41,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:41,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:41,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:41,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:41,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:41,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:41,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:41,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:41,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:41,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:41,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:41,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:41,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:41,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:41,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:41,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534580076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:41,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:41,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:41,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154783649] [2022-01-28 14:52:41,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:41,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:41,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:41,968 INFO L87 Difference]: Start difference. First operand 431 states and 1340 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) [2022-01-28 14:52:42,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:42,114 INFO L93 Difference]: Finished difference Result 587 states and 1776 transitions. [2022-01-28 14:52:42,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:52:42,115 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 [2022-01-28 14:52:42,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:42,115 INFO L225 Difference]: With dead ends: 587 [2022-01-28 14:52:42,115 INFO L226 Difference]: Without dead ends: 572 [2022-01-28 14:52:42,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:42,116 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:42,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 128 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 270 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-01-28 14:52:42,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-28 14:52:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 432. [2022-01-28 14:52:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.120649651972158) internal successors, (1345), 431 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1345 transitions. [2022-01-28 14:52:42,121 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1345 transitions. Word has length 20 [2022-01-28 14:52:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:42,121 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1345 transitions. [2022-01-28 14:52:42,121 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) [2022-01-28 14:52:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1345 transitions. [2022-01-28 14:52:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:42,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:42,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:42,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-01-28 14:52:42,322 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 [2022-01-28 14:52:42,322 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:42,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1871019469, now seen corresponding path program 156 times [2022-01-28 14:52:42,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:42,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769611681] [2022-01-28 14:52:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:42,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:42,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:42,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769611681] [2022-01-28 14:52:42,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769611681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:42,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376155276] [2022-01-28 14:52:42,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:42,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:42,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:42,458 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) [2022-01-28 14:52:42,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-28 14:52:42,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:52:42,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:42,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:42,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:42,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:42,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:42,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:42,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:42,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:42,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:42,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:42,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:52:42,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:42,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:52:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:42,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376155276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:42,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:42,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:42,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358479798] [2022-01-28 14:52:42,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:42,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:42,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:42,880 INFO L87 Difference]: Start difference. First operand 432 states and 1345 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) [2022-01-28 14:52:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:43,279 INFO L93 Difference]: Finished difference Result 644 states and 1918 transitions. [2022-01-28 14:52:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:52:43,280 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 [2022-01-28 14:52:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:43,281 INFO L225 Difference]: With dead ends: 644 [2022-01-28 14:52:43,281 INFO L226 Difference]: Without dead ends: 614 [2022-01-28 14:52:43,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:43,281 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:43,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 289 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:52:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-28 14:52:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 428. [2022-01-28 14:52:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.117096018735363) internal successors, (1331), 427 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1331 transitions. [2022-01-28 14:52:43,286 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1331 transitions. Word has length 20 [2022-01-28 14:52:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:43,286 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1331 transitions. [2022-01-28 14:52:43,286 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) [2022-01-28 14:52:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1331 transitions. [2022-01-28 14:52:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:43,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:43,287 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:43,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-28 14:52:43,487 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 [2022-01-28 14:52:43,487 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1120583433, now seen corresponding path program 157 times [2022-01-28 14:52:43,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:43,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996700172] [2022-01-28 14:52:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:43,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:43,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996700172] [2022-01-28 14:52:43,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996700172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766698828] [2022-01-28 14:52:43,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:43,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:43,597 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) [2022-01-28 14:52:43,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-28 14:52:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:43,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:43,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:43,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:43,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:43,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:43,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:43,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:43,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:43,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:43,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:43,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766698828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:43,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:43,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:52:43,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995238168] [2022-01-28 14:52:43,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:43,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:52:43,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:43,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:52:43,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:43,983 INFO L87 Difference]: Start difference. First operand 428 states and 1331 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) [2022-01-28 14:52:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:44,362 INFO L93 Difference]: Finished difference Result 755 states and 2269 transitions. [2022-01-28 14:52:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:52:44,363 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 [2022-01-28 14:52:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:44,364 INFO L225 Difference]: With dead ends: 755 [2022-01-28 14:52:44,364 INFO L226 Difference]: Without dead ends: 740 [2022-01-28 14:52:44,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:52:44,364 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:44,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 172 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:52:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-01-28 14:52:44,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 431. [2022-01-28 14:52:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.116279069767442) internal successors, (1340), 430 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1340 transitions. [2022-01-28 14:52:44,370 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1340 transitions. Word has length 20 [2022-01-28 14:52:44,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:44,371 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1340 transitions. [2022-01-28 14:52:44,371 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) [2022-01-28 14:52:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1340 transitions. [2022-01-28 14:52:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:44,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:44,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:44,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-01-28 14:52:44,571 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 [2022-01-28 14:52:44,572 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:44,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1256961823, now seen corresponding path program 158 times [2022-01-28 14:52:44,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:44,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464667903] [2022-01-28 14:52:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:44,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:44,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:44,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464667903] [2022-01-28 14:52:44,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464667903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:44,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838127461] [2022-01-28 14:52:44,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:44,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:44,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:44,693 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) [2022-01-28 14:52:44,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-28 14:52:44,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:44,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:44,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:44,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:44,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:44,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:44,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:44,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:44,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:45,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:45,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:45,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:45,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:45,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838127461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:45,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:45,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:52:45,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668059113] [2022-01-28 14:52:45,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:45,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:52:45,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:52:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:45,095 INFO L87 Difference]: Start difference. First operand 431 states and 1340 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) [2022-01-28 14:52:45,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:45,431 INFO L93 Difference]: Finished difference Result 653 states and 1970 transitions. [2022-01-28 14:52:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:52:45,432 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 [2022-01-28 14:52:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:45,433 INFO L225 Difference]: With dead ends: 653 [2022-01-28 14:52:45,433 INFO L226 Difference]: Without dead ends: 638 [2022-01-28 14:52:45,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:45,433 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:45,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 207 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-28 14:52:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 435. [2022-01-28 14:52:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.119815668202765) internal successors, (1354), 434 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) [2022-01-28 14:52:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1354 transitions. [2022-01-28 14:52:45,439 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1354 transitions. Word has length 20 [2022-01-28 14:52:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:45,439 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1354 transitions. [2022-01-28 14:52:45,439 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) [2022-01-28 14:52:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1354 transitions. [2022-01-28 14:52:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:45,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:45,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:45,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:45,640 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 [2022-01-28 14:52:45,640 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:45,640 INFO L85 PathProgramCache]: Analyzing trace with hash -660855907, now seen corresponding path program 159 times [2022-01-28 14:52:45,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:45,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357684941] [2022-01-28 14:52:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:45,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:45,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:45,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357684941] [2022-01-28 14:52:45,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357684941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:45,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76556432] [2022-01-28 14:52:45,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:45,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:45,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:45,769 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) [2022-01-28 14:52:45,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-28 14:52:45,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:52:45,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:45,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:45,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:45,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:45,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:46,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:46,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:46,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:46,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:46,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:46,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:46,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76556432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:46,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:46,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:52:46,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330864498] [2022-01-28 14:52:46,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:46,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:52:46,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:46,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:52:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:46,168 INFO L87 Difference]: Start difference. First operand 435 states and 1354 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) [2022-01-28 14:52:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:46,510 INFO L93 Difference]: Finished difference Result 665 states and 2000 transitions. [2022-01-28 14:52:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:52:46,510 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 [2022-01-28 14:52:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:46,511 INFO L225 Difference]: With dead ends: 665 [2022-01-28 14:52:46,511 INFO L226 Difference]: Without dead ends: 650 [2022-01-28 14:52:46,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:46,512 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:46,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 205 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-28 14:52:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 434. [2022-01-28 14:52:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.115473441108545) internal successors, (1349), 433 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) [2022-01-28 14:52:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1349 transitions. [2022-01-28 14:52:46,517 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1349 transitions. Word has length 20 [2022-01-28 14:52:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:46,517 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1349 transitions. [2022-01-28 14:52:46,517 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) [2022-01-28 14:52:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1349 transitions. [2022-01-28 14:52:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:46,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:46,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:46,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-01-28 14:52:46,718 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 [2022-01-28 14:52:46,718 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:46,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1153451669, now seen corresponding path program 160 times [2022-01-28 14:52:46,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:46,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443849622] [2022-01-28 14:52:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:46,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:46,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:46,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443849622] [2022-01-28 14:52:46,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443849622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:46,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419701210] [2022-01-28 14:52:46,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:46,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:46,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:46,836 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) [2022-01-28 14:52:46,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-28 14:52:46,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:46,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:46,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:46,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:46,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:47,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:47,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:47,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:47,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:47,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:47,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:47,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:47,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419701210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:47,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:47,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:52:47,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422892368] [2022-01-28 14:52:47,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:47,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:52:47,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:52:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:52:47,251 INFO L87 Difference]: Start difference. First operand 434 states and 1349 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) [2022-01-28 14:52:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:47,502 INFO L93 Difference]: Finished difference Result 632 states and 1907 transitions. [2022-01-28 14:52:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:52:47,503 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 [2022-01-28 14:52:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:47,504 INFO L225 Difference]: With dead ends: 632 [2022-01-28 14:52:47,504 INFO L226 Difference]: Without dead ends: 617 [2022-01-28 14:52:47,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:47,504 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:47,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 157 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:52:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-28 14:52:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 431. [2022-01-28 14:52:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.116279069767442) internal successors, (1340), 430 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1340 transitions. [2022-01-28 14:52:47,509 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1340 transitions. Word has length 20 [2022-01-28 14:52:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:47,509 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1340 transitions. [2022-01-28 14:52:47,509 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) [2022-01-28 14:52:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1340 transitions. [2022-01-28 14:52:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:47,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:47,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:47,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-28 14:52:47,710 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 [2022-01-28 14:52:47,711 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:47,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:47,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1295514809, now seen corresponding path program 161 times [2022-01-28 14:52:47,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:47,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092138836] [2022-01-28 14:52:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:47,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:47,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:47,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092138836] [2022-01-28 14:52:47,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092138836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:47,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968395051] [2022-01-28 14:52:47,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:47,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:47,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:47,812 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) [2022-01-28 14:52:47,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-28 14:52:47,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:47,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:47,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:47,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:47,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:47,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:47,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:48,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:48,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:48,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:48,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:48,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:48,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:48,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968395051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:48,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:48,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:52:48,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185669053] [2022-01-28 14:52:48,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:48,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:52:48,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:52:48,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:52:48,173 INFO L87 Difference]: Start difference. First operand 431 states and 1340 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) [2022-01-28 14:52:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:48,869 INFO L93 Difference]: Finished difference Result 735 states and 2223 transitions. [2022-01-28 14:52:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:52:48,869 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 [2022-01-28 14:52:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:48,870 INFO L225 Difference]: With dead ends: 735 [2022-01-28 14:52:48,870 INFO L226 Difference]: Without dead ends: 705 [2022-01-28 14:52:48,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:52:48,870 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:48,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 254 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:52:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-28 14:52:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 437. [2022-01-28 14:52:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.114678899082569) internal successors, (1358), 436 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1358 transitions. [2022-01-28 14:52:48,876 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1358 transitions. Word has length 20 [2022-01-28 14:52:48,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:48,876 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1358 transitions. [2022-01-28 14:52:48,876 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) [2022-01-28 14:52:48,876 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1358 transitions. [2022-01-28 14:52:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:48,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:48,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:48,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-01-28 14:52:49,077 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 [2022-01-28 14:52:49,077 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash 297451609, now seen corresponding path program 162 times [2022-01-28 14:52:49,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:49,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178588205] [2022-01-28 14:52:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:49,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:49,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:49,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178588205] [2022-01-28 14:52:49,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178588205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:49,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061338639] [2022-01-28 14:52:49,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:49,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:49,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:49,181 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) [2022-01-28 14:52:49,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-28 14:52:49,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:52:49,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:49,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:49,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:49,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:49,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:49,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:49,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:49,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:49,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:49,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:49,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061338639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:49,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:49,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:52:49,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013993851] [2022-01-28 14:52:49,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:49,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:52:49,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:49,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:52:49,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:52:49,537 INFO L87 Difference]: Start difference. First operand 437 states and 1358 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) [2022-01-28 14:52:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:50,134 INFO L93 Difference]: Finished difference Result 692 states and 2112 transitions. [2022-01-28 14:52:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:52:50,134 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 [2022-01-28 14:52:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:50,135 INFO L225 Difference]: With dead ends: 692 [2022-01-28 14:52:50,135 INFO L226 Difference]: Without dead ends: 677 [2022-01-28 14:52:50,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:52:50,135 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:50,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 240 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-28 14:52:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 435. [2022-01-28 14:52:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1175115207373274) internal successors, (1353), 434 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) [2022-01-28 14:52:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1353 transitions. [2022-01-28 14:52:50,143 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1353 transitions. Word has length 20 [2022-01-28 14:52:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:50,143 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1353 transitions. [2022-01-28 14:52:50,143 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) [2022-01-28 14:52:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1353 transitions. [2022-01-28 14:52:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:50,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:50,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:50,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-28 14:52:50,366 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 [2022-01-28 14:52:50,366 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:50,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:50,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1031245811, now seen corresponding path program 163 times [2022-01-28 14:52:50,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:50,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869079994] [2022-01-28 14:52:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:50,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:50,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:50,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869079994] [2022-01-28 14:52:50,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869079994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:50,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023053119] [2022-01-28 14:52:50,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:50,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:50,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:50,464 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) [2022-01-28 14:52:50,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-28 14:52:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:50,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:50,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:50,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:50,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:50,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:50,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:50,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:50,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:50,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:50,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:50,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023053119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:50,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:50,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:52:50,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407565397] [2022-01-28 14:52:50,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:50,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:52:50,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:50,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:52:50,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:52:50,802 INFO L87 Difference]: Start difference. First operand 435 states and 1353 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) [2022-01-28 14:52:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:51,409 INFO L93 Difference]: Finished difference Result 817 states and 2469 transitions. [2022-01-28 14:52:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:52:51,409 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 [2022-01-28 14:52:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:51,410 INFO L225 Difference]: With dead ends: 817 [2022-01-28 14:52:51,410 INFO L226 Difference]: Without dead ends: 802 [2022-01-28 14:52:51,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:52:51,411 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 127 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:51,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 183 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-28 14:52:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 433. [2022-01-28 14:52:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1203703703703702) internal successors, (1348), 432 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1348 transitions. [2022-01-28 14:52:51,417 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1348 transitions. Word has length 20 [2022-01-28 14:52:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:51,417 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1348 transitions. [2022-01-28 14:52:51,417 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) [2022-01-28 14:52:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1348 transitions. [2022-01-28 14:52:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:51,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:51,417 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] [2022-01-28 14:52:51,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-28 14:52:51,618 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 [2022-01-28 14:52:51,618 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1485616967, now seen corresponding path program 164 times [2022-01-28 14:52:51,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:51,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426475006] [2022-01-28 14:52:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:51,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:51,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:51,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426475006] [2022-01-28 14:52:51,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426475006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:51,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414531243] [2022-01-28 14:52:51,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:52:51,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:51,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:51,758 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) [2022-01-28 14:52:51,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-28 14:52:51,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:51,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:51,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:51,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:51,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:51,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:51,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:51,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:52,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:52,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:52,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:52,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:52,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:52,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:52,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414531243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:52,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:52,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:52,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998262947] [2022-01-28 14:52:52,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:52,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:52,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:52,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:52,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:52,231 INFO L87 Difference]: Start difference. First operand 433 states and 1348 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) [2022-01-28 14:52:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:52,808 INFO L93 Difference]: Finished difference Result 718 states and 2201 transitions. [2022-01-28 14:52:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:52:52,808 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 [2022-01-28 14:52:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:52,809 INFO L225 Difference]: With dead ends: 718 [2022-01-28 14:52:52,809 INFO L226 Difference]: Without dead ends: 688 [2022-01-28 14:52:52,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:52:52,809 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:52,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 137 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 399 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-01-28 14:52:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-28 14:52:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 434. [2022-01-28 14:52:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.120092378752887) internal successors, (1351), 433 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1351 transitions. [2022-01-28 14:52:52,817 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1351 transitions. Word has length 20 [2022-01-28 14:52:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:52,817 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1351 transitions. [2022-01-28 14:52:52,817 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) [2022-01-28 14:52:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1351 transitions. [2022-01-28 14:52:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:52,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:52,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:52,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-28 14:52:53,031 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 [2022-01-28 14:52:53,031 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:53,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1508518055, now seen corresponding path program 165 times [2022-01-28 14:52:53,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:53,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270641861] [2022-01-28 14:52:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:53,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:53,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:53,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270641861] [2022-01-28 14:52:53,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270641861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:53,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886805730] [2022-01-28 14:52:53,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:52:53,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:53,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:53,176 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) [2022-01-28 14:52:53,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-28 14:52:53,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:52:53,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:53,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:53,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:53,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:53,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:53,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:53,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:53,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:53,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:53,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:53,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:53,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:53,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:53,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886805730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:53,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:53,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:53,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057399459] [2022-01-28 14:52:53,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:53,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:53,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:53,708 INFO L87 Difference]: Start difference. First operand 434 states and 1351 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) [2022-01-28 14:52:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:54,365 INFO L93 Difference]: Finished difference Result 725 states and 2207 transitions. [2022-01-28 14:52:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:52:54,366 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 [2022-01-28 14:52:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:54,367 INFO L225 Difference]: With dead ends: 725 [2022-01-28 14:52:54,367 INFO L226 Difference]: Without dead ends: 695 [2022-01-28 14:52:54,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:52:54,367 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 81 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:54,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 233 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 781 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2022-01-28 14:52:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-28 14:52:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 435. [2022-01-28 14:52:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1244239631336406) internal successors, (1356), 434 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) [2022-01-28 14:52:54,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1356 transitions. [2022-01-28 14:52:54,374 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1356 transitions. Word has length 20 [2022-01-28 14:52:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:54,374 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1356 transitions. [2022-01-28 14:52:54,374 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) [2022-01-28 14:52:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1356 transitions. [2022-01-28 14:52:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:54,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:54,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:54,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-28 14:52:54,576 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 [2022-01-28 14:52:54,577 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:54,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2009564985, now seen corresponding path program 166 times [2022-01-28 14:52:54,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:54,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002657329] [2022-01-28 14:52:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:54,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:54,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002657329] [2022-01-28 14:52:54,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002657329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250004196] [2022-01-28 14:52:54,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:52:54,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:54,716 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) [2022-01-28 14:52:54,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-28 14:52:54,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:52:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:54,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:54,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:55,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:55,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:55,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:55,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:55,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:55,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:55,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:55,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:55,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:55,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:55,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:55,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250004196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:55,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:55,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:52:55,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229818898] [2022-01-28 14:52:55,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:55,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:52:55,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:52:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:52:55,345 INFO L87 Difference]: Start difference. First operand 435 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) [2022-01-28 14:52:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:56,003 INFO L93 Difference]: Finished difference Result 718 states and 2191 transitions. [2022-01-28 14:52:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:52:56,004 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 [2022-01-28 14:52:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:56,005 INFO L225 Difference]: With dead ends: 718 [2022-01-28 14:52:56,005 INFO L226 Difference]: Without dead ends: 703 [2022-01-28 14:52:56,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:52:56,005 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:56,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 207 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 624 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-01-28 14:52:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-28 14:52:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 435. [2022-01-28 14:52:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1244239631336406) internal successors, (1356), 434 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) [2022-01-28 14:52:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1356 transitions. [2022-01-28 14:52:56,013 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1356 transitions. Word has length 20 [2022-01-28 14:52:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:56,013 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1356 transitions. [2022-01-28 14:52:56,013 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) [2022-01-28 14:52:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1356 transitions. [2022-01-28 14:52:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:56,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:56,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:56,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-28 14:52:56,219 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 [2022-01-28 14:52:56,219 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:56,220 INFO L85 PathProgramCache]: Analyzing trace with hash -912412139, now seen corresponding path program 167 times [2022-01-28 14:52:56,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:56,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994410082] [2022-01-28 14:52:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:56,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:56,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994410082] [2022-01-28 14:52:56,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994410082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478096283] [2022-01-28 14:52:56,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:52:56,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:56,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:56,339 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) [2022-01-28 14:52:56,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-28 14:52:56,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:52:56,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:56,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:56,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:56,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:56,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:56,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:56,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:56,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:56,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:56,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:56,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:56,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:56,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478096283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:56,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:56,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-28 14:52:56,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38607682] [2022-01-28 14:52:56,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:56,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:52:56,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:52:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:52:56,713 INFO L87 Difference]: Start difference. First operand 435 states and 1356 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) [2022-01-28 14:52:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:57,304 INFO L93 Difference]: Finished difference Result 705 states and 2146 transitions. [2022-01-28 14:52:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:52:57,305 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 [2022-01-28 14:52:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:57,306 INFO L225 Difference]: With dead ends: 705 [2022-01-28 14:52:57,306 INFO L226 Difference]: Without dead ends: 690 [2022-01-28 14:52:57,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:52:57,306 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:57,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 220 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:52:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-28 14:52:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 433. [2022-01-28 14:52:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1180555555555554) internal successors, (1347), 432 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:52:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1347 transitions. [2022-01-28 14:52:57,312 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1347 transitions. Word has length 20 [2022-01-28 14:52:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:57,312 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1347 transitions. [2022-01-28 14:52:57,312 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) [2022-01-28 14:52:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1347 transitions. [2022-01-28 14:52:57,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:57,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:57,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:57,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-01-28 14:52:57,513 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 [2022-01-28 14:52:57,513 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1717649673, now seen corresponding path program 168 times [2022-01-28 14:52:57,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:57,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759930299] [2022-01-28 14:52:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:57,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:57,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:57,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759930299] [2022-01-28 14:52:57,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759930299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:57,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118562491] [2022-01-28 14:52:57,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:52:57,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:57,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:57,614 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) [2022-01-28 14:52:57,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-28 14:52:57,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:52:57,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:52:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:57,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:57,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:57,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:52:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:57,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:57,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:57,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:57,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:57,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:57,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:57,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:57,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118562491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:57,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:57,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:52:57,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474273839] [2022-01-28 14:52:57,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:57,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:52:57,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:57,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:52:57,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:52:57,966 INFO L87 Difference]: Start difference. First operand 433 states and 1347 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) [2022-01-28 14:52:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:58,594 INFO L93 Difference]: Finished difference Result 844 states and 2540 transitions. [2022-01-28 14:52:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:52:58,594 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 [2022-01-28 14:52:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:58,596 INFO L225 Difference]: With dead ends: 844 [2022-01-28 14:52:58,596 INFO L226 Difference]: Without dead ends: 829 [2022-01-28 14:52:58,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:52:58,596 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 131 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:58,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 162 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:52:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-28 14:52:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 432. [2022-01-28 14:52:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1160092807424595) internal successors, (1343), 431 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) [2022-01-28 14:52:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1343 transitions. [2022-01-28 14:52:58,602 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1343 transitions. Word has length 20 [2022-01-28 14:52:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:58,602 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1343 transitions. [2022-01-28 14:52:58,602 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) [2022-01-28 14:52:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1343 transitions. [2022-01-28 14:52:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:58,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:58,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:58,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-01-28 14:52:58,803 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 [2022-01-28 14:52:58,803 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:58,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash 606055905, now seen corresponding path program 169 times [2022-01-28 14:52:58,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:58,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620781516] [2022-01-28 14:52:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:58,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:58,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:52:58,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620781516] [2022-01-28 14:52:58,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620781516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:52:58,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395992243] [2022-01-28 14:52:58,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:52:58,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:52:58,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:52:58,910 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) [2022-01-28 14:52:58,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-28 14:52:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:52:58,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:52:58,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:52:59,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:59,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:52:59,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:59,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:59,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:52:59,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:52:59,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:59,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:52:59,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:59,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:52:59,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:52:59,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:52:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:52:59,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395992243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:52:59,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:52:59,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:52:59,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174000288] [2022-01-28 14:52:59,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:52:59,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:52:59,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:52:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:52:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:52:59,378 INFO L87 Difference]: Start difference. First operand 432 states and 1343 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) [2022-01-28 14:52:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:52:59,686 INFO L93 Difference]: Finished difference Result 633 states and 1909 transitions. [2022-01-28 14:52:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:52:59,686 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 [2022-01-28 14:52:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:52:59,687 INFO L225 Difference]: With dead ends: 633 [2022-01-28 14:52:59,687 INFO L226 Difference]: Without dead ends: 603 [2022-01-28 14:52:59,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:52:59,691 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:52:59,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 198 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 571 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-01-28 14:52:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-28 14:52:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 435. [2022-01-28 14:52:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1152073732718892) internal successors, (1352), 434 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) [2022-01-28 14:52:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1352 transitions. [2022-01-28 14:52:59,699 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1352 transitions. Word has length 20 [2022-01-28 14:52:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:52:59,699 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1352 transitions. [2022-01-28 14:52:59,699 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) [2022-01-28 14:52:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1352 transitions. [2022-01-28 14:52:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:52:59,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:52:59,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:52:59,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-28 14:52:59,921 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 [2022-01-28 14:52:59,922 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:52:59,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:52:59,922 INFO L85 PathProgramCache]: Analyzing trace with hash -392007295, now seen corresponding path program 170 times [2022-01-28 14:52:59,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:52:59,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680822682] [2022-01-28 14:52:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:52:59,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:52:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:00,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:00,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680822682] [2022-01-28 14:53:00,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680822682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:00,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96994680] [2022-01-28 14:53:00,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:00,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:00,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:00,059 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) [2022-01-28 14:53:00,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-28 14:53:00,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:00,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:00,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:00,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:00,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:00,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:00,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:00,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:00,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:00,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:00,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:00,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:00,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:00,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:00,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:00,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:00,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96994680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:00,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:00,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:00,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30056396] [2022-01-28 14:53:00,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:00,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:00,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:00,551 INFO L87 Difference]: Start difference. First operand 435 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) [2022-01-28 14:53:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:00,842 INFO L93 Difference]: Finished difference Result 647 states and 1955 transitions. [2022-01-28 14:53:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:00,843 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 [2022-01-28 14:53:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:00,844 INFO L225 Difference]: With dead ends: 647 [2022-01-28 14:53:00,844 INFO L226 Difference]: Without dead ends: 617 [2022-01-28 14:53:00,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:00,844 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:00,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 173 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 481 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-28 14:53:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-28 14:53:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 433. [2022-01-28 14:53:00,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1180555555555554) internal successors, (1347), 432 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1347 transitions. [2022-01-28 14:53:00,850 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1347 transitions. Word has length 20 [2022-01-28 14:53:00,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:00,850 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1347 transitions. [2022-01-28 14:53:00,850 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) [2022-01-28 14:53:00,850 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1347 transitions. [2022-01-28 14:53:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:00,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:00,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:00,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:01,062 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 [2022-01-28 14:53:01,063 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:01,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1905470117, now seen corresponding path program 171 times [2022-01-28 14:53:01,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:01,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115160121] [2022-01-28 14:53:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:01,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:01,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115160121] [2022-01-28 14:53:01,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115160121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032938488] [2022-01-28 14:53:01,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:01,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:01,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:01,207 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) [2022-01-28 14:53:01,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-28 14:53:01,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:53:01,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:01,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:01,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:01,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:01,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:01,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:01,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:01,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:01,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:01,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:01,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:01,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:01,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:01,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:01,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:01,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:01,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032938488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:01,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:01,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:01,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770922213] [2022-01-28 14:53:01,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:01,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:01,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:01,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:01,714 INFO L87 Difference]: Start difference. First operand 433 states and 1347 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) [2022-01-28 14:53:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:02,048 INFO L93 Difference]: Finished difference Result 702 states and 2096 transitions. [2022-01-28 14:53:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:53:02,049 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 [2022-01-28 14:53:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:02,050 INFO L225 Difference]: With dead ends: 702 [2022-01-28 14:53:02,050 INFO L226 Difference]: Without dead ends: 672 [2022-01-28 14:53:02,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:53:02,050 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:02,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 145 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 388 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-28 14:53:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-28 14:53:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 433. [2022-01-28 14:53:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1180555555555554) internal successors, (1347), 432 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1347 transitions. [2022-01-28 14:53:02,056 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1347 transitions. Word has length 20 [2022-01-28 14:53:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:02,056 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1347 transitions. [2022-01-28 14:53:02,056 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) [2022-01-28 14:53:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1347 transitions. [2022-01-28 14:53:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:02,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:02,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:02,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-28 14:53:02,257 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 [2022-01-28 14:53:02,257 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash -164785915, now seen corresponding path program 172 times [2022-01-28 14:53:02,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:02,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122024296] [2022-01-28 14:53:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:02,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:02,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:02,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122024296] [2022-01-28 14:53:02,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122024296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:02,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985982393] [2022-01-28 14:53:02,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:02,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:02,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:02,408 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) [2022-01-28 14:53:02,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-28 14:53:02,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:02,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:02,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:02,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:02,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:02,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:02,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:02,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:02,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:02,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:02,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:02,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:02,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:02,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:02,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:02,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:02,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985982393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:02,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:02,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:02,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094030000] [2022-01-28 14:53:02,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:02,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:02,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:02,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:02,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:02,948 INFO L87 Difference]: Start difference. First operand 433 states and 1347 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) [2022-01-28 14:53:03,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:03,268 INFO L93 Difference]: Finished difference Result 645 states and 1950 transitions. [2022-01-28 14:53:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:03,268 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 [2022-01-28 14:53:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:03,269 INFO L225 Difference]: With dead ends: 645 [2022-01-28 14:53:03,269 INFO L226 Difference]: Without dead ends: 615 [2022-01-28 14:53:03,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:03,270 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:03,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 165 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 530 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-01-28 14:53:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-28 14:53:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 434. [2022-01-28 14:53:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1224018475750577) internal successors, (1352), 433 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) [2022-01-28 14:53:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1352 transitions. [2022-01-28 14:53:03,277 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1352 transitions. Word has length 20 [2022-01-28 14:53:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:03,277 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1352 transitions. [2022-01-28 14:53:03,278 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) [2022-01-28 14:53:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1352 transitions. [2022-01-28 14:53:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:03,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:03,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:03,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-01-28 14:53:03,491 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 [2022-01-28 14:53:03,491 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:03,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash -941670171, now seen corresponding path program 173 times [2022-01-28 14:53:03,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:03,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937258568] [2022-01-28 14:53:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:03,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:03,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:03,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937258568] [2022-01-28 14:53:03,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937258568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:03,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395331832] [2022-01-28 14:53:03,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:03,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:03,637 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) [2022-01-28 14:53:03,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-28 14:53:03,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:03,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:03,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:03,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:03,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:03,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:03,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:03,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:03,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:03,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:03,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:04,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:04,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:04,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:04,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:04,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:04,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:04,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395331832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:04,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:04,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:04,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32822693] [2022-01-28 14:53:04,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:04,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:04,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:04,219 INFO L87 Difference]: Start difference. First operand 434 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) [2022-01-28 14:53:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:04,560 INFO L93 Difference]: Finished difference Result 670 states and 2021 transitions. [2022-01-28 14:53:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:53:04,561 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 [2022-01-28 14:53:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:04,562 INFO L225 Difference]: With dead ends: 670 [2022-01-28 14:53:04,562 INFO L226 Difference]: Without dead ends: 655 [2022-01-28 14:53:04,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:53:04,562 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:04,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 194 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 516 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-01-28 14:53:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-28 14:53:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 434. [2022-01-28 14:53:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1224018475750577) internal successors, (1352), 433 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) [2022-01-28 14:53:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1352 transitions. [2022-01-28 14:53:04,568 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1352 transitions. Word has length 20 [2022-01-28 14:53:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:04,568 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1352 transitions. [2022-01-28 14:53:04,568 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) [2022-01-28 14:53:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1352 transitions. [2022-01-28 14:53:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:04,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:04,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:04,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-28 14:53:04,769 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 [2022-01-28 14:53:04,769 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash 431320001, now seen corresponding path program 174 times [2022-01-28 14:53:04,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:04,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636808366] [2022-01-28 14:53:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:04,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:04,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:04,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636808366] [2022-01-28 14:53:04,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636808366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:04,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317173632] [2022-01-28 14:53:04,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:04,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:04,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:04,885 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) [2022-01-28 14:53:04,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-28 14:53:04,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:53:04,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:04,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:04,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:04,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:04,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:05,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:05,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:05,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:05,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:05,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:05,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:05,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:05,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:05,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:05,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:05,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:05,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317173632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:05,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:05,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:53:05,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189988250] [2022-01-28 14:53:05,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:05,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:53:05,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:05,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:53:05,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:53:05,338 INFO L87 Difference]: Start difference. First operand 434 states and 1352 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) [2022-01-28 14:53:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:05,652 INFO L93 Difference]: Finished difference Result 647 states and 1951 transitions. [2022-01-28 14:53:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:05,652 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 [2022-01-28 14:53:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:05,653 INFO L225 Difference]: With dead ends: 647 [2022-01-28 14:53:05,653 INFO L226 Difference]: Without dead ends: 617 [2022-01-28 14:53:05,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:05,653 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:05,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 168 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 529 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-01-28 14:53:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-28 14:53:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 432. [2022-01-28 14:53:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1160092807424595) internal successors, (1343), 431 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) [2022-01-28 14:53:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1343 transitions. [2022-01-28 14:53:05,659 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1343 transitions. Word has length 20 [2022-01-28 14:53:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:05,659 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1343 transitions. [2022-01-28 14:53:05,659 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) [2022-01-28 14:53:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1343 transitions. [2022-01-28 14:53:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:05,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:05,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:05,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-28 14:53:05,860 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 [2022-01-28 14:53:05,860 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash -480096617, now seen corresponding path program 175 times [2022-01-28 14:53:05,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:05,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59990925] [2022-01-28 14:53:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:05,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:05,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59990925] [2022-01-28 14:53:05,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59990925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:05,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671999115] [2022-01-28 14:53:05,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:05,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:05,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:06,000 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) [2022-01-28 14:53:06,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-28 14:53:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:06,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:06,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:06,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:06,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:06,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:06,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:06,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:06,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:06,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:06,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:06,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:06,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:06,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:06,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:06,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671999115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:06,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:06,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:06,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892101963] [2022-01-28 14:53:06,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:06,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:06,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:06,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:06,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:06,499 INFO L87 Difference]: Start difference. First operand 432 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) [2022-01-28 14:53:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:06,839 INFO L93 Difference]: Finished difference Result 699 states and 2094 transitions. [2022-01-28 14:53:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:53:06,840 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 [2022-01-28 14:53:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:06,841 INFO L225 Difference]: With dead ends: 699 [2022-01-28 14:53:06,841 INFO L226 Difference]: Without dead ends: 669 [2022-01-28 14:53:06,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:06,841 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:06,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 209 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 642 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-28 14:53:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-28 14:53:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 439. [2022-01-28 14:53:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.1232876712328768) internal successors, (1368), 438 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) [2022-01-28 14:53:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1368 transitions. [2022-01-28 14:53:06,849 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1368 transitions. Word has length 20 [2022-01-28 14:53:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:06,849 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1368 transitions. [2022-01-28 14:53:06,849 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) [2022-01-28 14:53:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1368 transitions. [2022-01-28 14:53:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:06,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:06,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:06,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-01-28 14:53:07,051 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 [2022-01-28 14:53:07,051 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:07,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash 441605523, now seen corresponding path program 176 times [2022-01-28 14:53:07,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:07,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228855469] [2022-01-28 14:53:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:07,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:07,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228855469] [2022-01-28 14:53:07,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228855469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:07,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481997383] [2022-01-28 14:53:07,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:07,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:07,159 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) [2022-01-28 14:53:07,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-28 14:53:07,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:07,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:07,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:07,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:07,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:07,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:07,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:07,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:07,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:07,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:07,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:07,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:07,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:07,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:07,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:07,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:07,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:07,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481997383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:07,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:07,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:53:07,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721232860] [2022-01-28 14:53:07,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:07,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:53:07,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:53:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:53:07,638 INFO L87 Difference]: Start difference. First operand 439 states and 1368 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) [2022-01-28 14:53:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:07,877 INFO L93 Difference]: Finished difference Result 616 states and 1870 transitions. [2022-01-28 14:53:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:07,877 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 [2022-01-28 14:53:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:07,878 INFO L225 Difference]: With dead ends: 616 [2022-01-28 14:53:07,878 INFO L226 Difference]: Without dead ends: 601 [2022-01-28 14:53:07,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:07,878 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:07,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 174 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 488 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-01-28 14:53:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-28 14:53:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 436. [2022-01-28 14:53:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.1149425287356323) internal successors, (1355), 435 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1355 transitions. [2022-01-28 14:53:07,886 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1355 transitions. Word has length 20 [2022-01-28 14:53:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:07,886 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1355 transitions. [2022-01-28 14:53:07,886 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) [2022-01-28 14:53:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1355 transitions. [2022-01-28 14:53:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:07,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:07,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:07,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:08,103 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 [2022-01-28 14:53:08,103 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1767515735, now seen corresponding path program 177 times [2022-01-28 14:53:08,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723739722] [2022-01-28 14:53:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:08,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:08,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:08,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723739722] [2022-01-28 14:53:08,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723739722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:08,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036210105] [2022-01-28 14:53:08,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:08,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:08,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:08,238 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) [2022-01-28 14:53:08,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-28 14:53:08,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:53:08,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:08,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:08,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:08,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:08,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:08,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:08,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:08,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:08,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:08,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:08,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:08,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:08,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:08,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:08,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:08,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:08,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036210105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:08,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:08,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:08,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630355639] [2022-01-28 14:53:08,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:08,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:08,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:08,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:08,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:08,721 INFO L87 Difference]: Start difference. First operand 436 states and 1355 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) [2022-01-28 14:53:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:09,025 INFO L93 Difference]: Finished difference Result 656 states and 1979 transitions. [2022-01-28 14:53:09,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:09,025 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 [2022-01-28 14:53:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:09,026 INFO L225 Difference]: With dead ends: 656 [2022-01-28 14:53:09,026 INFO L226 Difference]: Without dead ends: 626 [2022-01-28 14:53:09,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:09,026 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:09,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 199 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 552 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-01-28 14:53:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-28 14:53:09,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 436. [2022-01-28 14:53:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.1149425287356323) internal successors, (1355), 435 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1355 transitions. [2022-01-28 14:53:09,032 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1355 transitions. Word has length 20 [2022-01-28 14:53:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:09,032 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1355 transitions. [2022-01-28 14:53:09,032 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) [2022-01-28 14:53:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1355 transitions. [2022-01-28 14:53:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:09,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:09,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:09,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:09,240 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 [2022-01-28 14:53:09,240 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1812299891, now seen corresponding path program 178 times [2022-01-28 14:53:09,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:09,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801121281] [2022-01-28 14:53:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:09,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:09,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:09,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801121281] [2022-01-28 14:53:09,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801121281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:09,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494628466] [2022-01-28 14:53:09,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:09,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:09,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:09,362 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) [2022-01-28 14:53:09,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-28 14:53:09,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:09,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:09,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:09,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:09,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:09,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:09,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:09,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:09,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:09,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:09,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:09,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:09,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:09,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:09,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:09,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:09,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494628466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:09,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:09,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:09,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492545049] [2022-01-28 14:53:09,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:09,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:09,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:09,814 INFO L87 Difference]: Start difference. First operand 436 states and 1355 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) [2022-01-28 14:53:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:10,077 INFO L93 Difference]: Finished difference Result 618 states and 1865 transitions. [2022-01-28 14:53:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:53:10,077 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 [2022-01-28 14:53:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:10,078 INFO L225 Difference]: With dead ends: 618 [2022-01-28 14:53:10,078 INFO L226 Difference]: Without dead ends: 588 [2022-01-28 14:53:10,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:10,078 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:10,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 186 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 507 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-01-28 14:53:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-28 14:53:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 440. [2022-01-28 14:53:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.123006833712984) internal successors, (1371), 439 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1371 transitions. [2022-01-28 14:53:10,084 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1371 transitions. Word has length 20 [2022-01-28 14:53:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:10,084 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1371 transitions. [2022-01-28 14:53:10,084 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) [2022-01-28 14:53:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1371 transitions. [2022-01-28 14:53:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:10,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:10,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:10,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-01-28 14:53:10,306 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 [2022-01-28 14:53:10,306 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:10,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:10,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1225384289, now seen corresponding path program 179 times [2022-01-28 14:53:10,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:10,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218280782] [2022-01-28 14:53:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:10,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:10,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:10,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218280782] [2022-01-28 14:53:10,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218280782] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:10,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966483740] [2022-01-28 14:53:10,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:10,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:10,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:10,430 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) [2022-01-28 14:53:10,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-28 14:53:10,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:10,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:10,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:10,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:10,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:10,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:10,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:10,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:10,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:10,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:10,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:10,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:10,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:10,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:10,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:10,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966483740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:10,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:10,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:10,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682499021] [2022-01-28 14:53:10,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:10,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:10,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:10,915 INFO L87 Difference]: Start difference. First operand 440 states and 1371 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) [2022-01-28 14:53:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:11,224 INFO L93 Difference]: Finished difference Result 637 states and 1904 transitions. [2022-01-28 14:53:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:11,224 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 [2022-01-28 14:53:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:11,225 INFO L225 Difference]: With dead ends: 637 [2022-01-28 14:53:11,225 INFO L226 Difference]: Without dead ends: 607 [2022-01-28 14:53:11,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:11,226 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:11,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 235 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 729 Invalid, 0 Unknown, 155 Unchecked, 0.3s Time] [2022-01-28 14:53:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-28 14:53:11,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 436. [2022-01-28 14:53:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.1241379310344826) internal successors, (1359), 435 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1359 transitions. [2022-01-28 14:53:11,231 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1359 transitions. Word has length 20 [2022-01-28 14:53:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:11,231 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1359 transitions. [2022-01-28 14:53:11,231 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) [2022-01-28 14:53:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1359 transitions. [2022-01-28 14:53:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:11,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:11,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:11,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-28 14:53:11,435 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 [2022-01-28 14:53:11,435 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash 324317717, now seen corresponding path program 180 times [2022-01-28 14:53:11,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:11,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269605850] [2022-01-28 14:53:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:11,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:11,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:11,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269605850] [2022-01-28 14:53:11,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269605850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:11,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188047141] [2022-01-28 14:53:11,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:11,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:11,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:11,595 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) [2022-01-28 14:53:11,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-28 14:53:11,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:53:11,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:11,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:11,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:11,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:11,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:11,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:11,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:11,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:11,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:11,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:12,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:12,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:12,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:12,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:12,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188047141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:12,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:12,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:12,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584449426] [2022-01-28 14:53:12,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:12,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:12,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:12,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:12,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:12,090 INFO L87 Difference]: Start difference. First operand 436 states and 1359 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) [2022-01-28 14:53:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:12,321 INFO L93 Difference]: Finished difference Result 616 states and 1866 transitions. [2022-01-28 14:53:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:12,321 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 [2022-01-28 14:53:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:12,322 INFO L225 Difference]: With dead ends: 616 [2022-01-28 14:53:12,322 INFO L226 Difference]: Without dead ends: 601 [2022-01-28 14:53:12,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:12,323 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:12,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 178 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 433 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-01-28 14:53:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-28 14:53:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 438. [2022-01-28 14:53:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.128146453089245) internal successors, (1367), 437 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) [2022-01-28 14:53:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1367 transitions. [2022-01-28 14:53:12,329 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1367 transitions. Word has length 20 [2022-01-28 14:53:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:12,329 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1367 transitions. [2022-01-28 14:53:12,329 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) [2022-01-28 14:53:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1367 transitions. [2022-01-28 14:53:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:12,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:12,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:12,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-28 14:53:12,531 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 [2022-01-28 14:53:12,531 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash 6277207, now seen corresponding path program 181 times [2022-01-28 14:53:12,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:12,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806747230] [2022-01-28 14:53:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:12,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:12,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:12,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806747230] [2022-01-28 14:53:12,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806747230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:12,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512045084] [2022-01-28 14:53:12,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:12,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:12,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:12,655 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) [2022-01-28 14:53:12,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-28 14:53:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:12,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:12,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:12,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:12,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:12,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:12,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:12,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:12,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:13,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:13,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:13,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:13,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:13,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:13,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:13,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512045084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:13,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:13,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:13,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379976206] [2022-01-28 14:53:13,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:13,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:13,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:13,135 INFO L87 Difference]: Start difference. First operand 438 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) [2022-01-28 14:53:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:13,401 INFO L93 Difference]: Finished difference Result 600 states and 1818 transitions. [2022-01-28 14:53:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:13,401 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 [2022-01-28 14:53:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:13,402 INFO L225 Difference]: With dead ends: 600 [2022-01-28 14:53:13,402 INFO L226 Difference]: Without dead ends: 593 [2022-01-28 14:53:13,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:13,402 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:13,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 160 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 528 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-28 14:53:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-28 14:53:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 439. [2022-01-28 14:53:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.127853881278539) internal successors, (1370), 438 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1370 transitions. [2022-01-28 14:53:13,408 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1370 transitions. Word has length 20 [2022-01-28 14:53:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:13,408 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1370 transitions. [2022-01-28 14:53:13,408 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) [2022-01-28 14:53:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1370 transitions. [2022-01-28 14:53:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:13,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:13,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:13,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-01-28 14:53:13,609 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 [2022-01-28 14:53:13,609 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash 593192809, now seen corresponding path program 182 times [2022-01-28 14:53:13,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:13,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73500927] [2022-01-28 14:53:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:13,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:13,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:13,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73500927] [2022-01-28 14:53:13,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73500927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:13,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811706556] [2022-01-28 14:53:13,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:13,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:13,740 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) [2022-01-28 14:53:13,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-28 14:53:13,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:13,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:13,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:13,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:13,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:13,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:13,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:13,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:13,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:13,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:13,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:14,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:14,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:14,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:14,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:14,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:14,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:14,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811706556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:14,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:14,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:14,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433982280] [2022-01-28 14:53:14,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:14,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:14,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:14,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:14,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:14,242 INFO L87 Difference]: Start difference. First operand 439 states and 1370 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) [2022-01-28 14:53:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:14,469 INFO L93 Difference]: Finished difference Result 656 states and 1945 transitions. [2022-01-28 14:53:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:14,470 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 [2022-01-28 14:53:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:14,470 INFO L225 Difference]: With dead ends: 656 [2022-01-28 14:53:14,470 INFO L226 Difference]: Without dead ends: 626 [2022-01-28 14:53:14,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:14,471 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:14,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 157 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 457 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-01-28 14:53:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-28 14:53:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 445. [2022-01-28 14:53:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 3.1171171171171173) internal successors, (1384), 444 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1384 transitions. [2022-01-28 14:53:14,476 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1384 transitions. Word has length 20 [2022-01-28 14:53:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:14,476 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1384 transitions. [2022-01-28 14:53:14,476 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) [2022-01-28 14:53:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1384 transitions. [2022-01-28 14:53:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:14,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:14,477 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] [2022-01-28 14:53:14,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-28 14:53:14,692 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 [2022-01-28 14:53:14,692 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -82189119, now seen corresponding path program 183 times [2022-01-28 14:53:14,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964396836] [2022-01-28 14:53:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:14,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:14,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964396836] [2022-01-28 14:53:14,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964396836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:14,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641376445] [2022-01-28 14:53:14,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:14,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:14,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:14,811 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) [2022-01-28 14:53:14,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-28 14:53:14,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:53:14,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:14,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:14,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:14,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:15,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:15,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:15,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:15,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:15,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:15,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:15,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:15,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:15,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:15,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:15,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:15,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641376445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:15,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:15,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:15,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3358201] [2022-01-28 14:53:15,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:15,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:15,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:15,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:15,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:15,331 INFO L87 Difference]: Start difference. First operand 445 states and 1384 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) [2022-01-28 14:53:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:15,580 INFO L93 Difference]: Finished difference Result 621 states and 1860 transitions. [2022-01-28 14:53:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:15,580 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 [2022-01-28 14:53:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:15,581 INFO L225 Difference]: With dead ends: 621 [2022-01-28 14:53:15,581 INFO L226 Difference]: Without dead ends: 615 [2022-01-28 14:53:15,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:15,582 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:15,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 174 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 547 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-28 14:53:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-28 14:53:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 432. [2022-01-28 14:53:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1160092807424595) internal successors, (1343), 431 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) [2022-01-28 14:53:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1343 transitions. [2022-01-28 14:53:15,588 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1343 transitions. Word has length 20 [2022-01-28 14:53:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:15,588 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1343 transitions. [2022-01-28 14:53:15,588 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) [2022-01-28 14:53:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1343 transitions. [2022-01-28 14:53:15,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:15,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:15,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:15,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:15,810 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 [2022-01-28 14:53:15,811 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash 683836557, now seen corresponding path program 184 times [2022-01-28 14:53:15,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:15,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699435354] [2022-01-28 14:53:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:15,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:15,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699435354] [2022-01-28 14:53:15,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699435354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390899658] [2022-01-28 14:53:15,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:15,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:15,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:15,951 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) [2022-01-28 14:53:15,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-28 14:53:15,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:15,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:15,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:16,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:16,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:16,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:16,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:16,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:16,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:16,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:16,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:16,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:16,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:16,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:16,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:16,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390899658] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:16,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:16,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:16,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688356426] [2022-01-28 14:53:16,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:16,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:16,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:16,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:16,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:16,474 INFO L87 Difference]: Start difference. First operand 432 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) [2022-01-28 14:53:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:16,744 INFO L93 Difference]: Finished difference Result 612 states and 1860 transitions. [2022-01-28 14:53:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:16,744 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 [2022-01-28 14:53:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:16,745 INFO L225 Difference]: With dead ends: 612 [2022-01-28 14:53:16,745 INFO L226 Difference]: Without dead ends: 597 [2022-01-28 14:53:16,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:16,746 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:16,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 147 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 422 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2022-01-28 14:53:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-28 14:53:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 434. [2022-01-28 14:53:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1224018475750577) internal successors, (1352), 433 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) [2022-01-28 14:53:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1352 transitions. [2022-01-28 14:53:16,752 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1352 transitions. Word has length 20 [2022-01-28 14:53:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:16,752 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1352 transitions. [2022-01-28 14:53:16,752 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) [2022-01-28 14:53:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1352 transitions. [2022-01-28 14:53:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:16,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:16,753 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] [2022-01-28 14:53:16,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:16,961 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 [2022-01-28 14:53:16,961 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash -93047699, now seen corresponding path program 185 times [2022-01-28 14:53:16,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:16,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973000571] [2022-01-28 14:53:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:16,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:17,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:17,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973000571] [2022-01-28 14:53:17,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973000571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:17,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777436337] [2022-01-28 14:53:17,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:17,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:17,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:17,096 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) [2022-01-28 14:53:17,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-28 14:53:17,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:53:17,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:17,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:17,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:17,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:17,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:17,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:17,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:17,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:17,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:17,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:17,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:17,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:17,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777436337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:17,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:17,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:17,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436713088] [2022-01-28 14:53:17,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:17,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:17,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:17,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:17,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:17,691 INFO L87 Difference]: Start difference. First operand 434 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) [2022-01-28 14:53:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:17,950 INFO L93 Difference]: Finished difference Result 602 states and 1822 transitions. [2022-01-28 14:53:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:17,950 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 [2022-01-28 14:53:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:17,951 INFO L225 Difference]: With dead ends: 602 [2022-01-28 14:53:17,951 INFO L226 Difference]: Without dead ends: 587 [2022-01-28 14:53:17,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:17,951 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:17,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 211 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 511 Invalid, 0 Unknown, 247 Unchecked, 0.2s Time] [2022-01-28 14:53:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-01-28 14:53:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 434. [2022-01-28 14:53:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1224018475750577) internal successors, (1352), 433 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) [2022-01-28 14:53:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1352 transitions. [2022-01-28 14:53:17,957 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1352 transitions. Word has length 20 [2022-01-28 14:53:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:17,957 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1352 transitions. [2022-01-28 14:53:17,957 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) [2022-01-28 14:53:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1352 transitions. [2022-01-28 14:53:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:17,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:17,958 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] [2022-01-28 14:53:17,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-28 14:53:18,158 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 [2022-01-28 14:53:18,158 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:18,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:18,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1279942473, now seen corresponding path program 186 times [2022-01-28 14:53:18,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:18,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826231245] [2022-01-28 14:53:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:18,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:18,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:18,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826231245] [2022-01-28 14:53:18,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826231245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:18,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413494309] [2022-01-28 14:53:18,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:18,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:18,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:18,303 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) [2022-01-28 14:53:18,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-28 14:53:18,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:53:18,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:18,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:18,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:18,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:18,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:18,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:18,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:18,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:18,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:18,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:18,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:18,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:18,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:18,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:18,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413494309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:18,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:18,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:18,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104812825] [2022-01-28 14:53:18,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:18,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:18,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:18,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:18,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:18,777 INFO L87 Difference]: Start difference. First operand 434 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) [2022-01-28 14:53:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:19,118 INFO L93 Difference]: Finished difference Result 610 states and 1853 transitions. [2022-01-28 14:53:19,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:19,119 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 [2022-01-28 14:53:19,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:19,120 INFO L225 Difference]: With dead ends: 610 [2022-01-28 14:53:19,120 INFO L226 Difference]: Without dead ends: 595 [2022-01-28 14:53:19,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:19,120 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:19,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 167 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 576 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-01-28 14:53:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-28 14:53:19,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 434. [2022-01-28 14:53:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1224018475750577) internal successors, (1352), 433 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) [2022-01-28 14:53:19,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1352 transitions. [2022-01-28 14:53:19,125 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1352 transitions. Word has length 20 [2022-01-28 14:53:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:19,125 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1352 transitions. [2022-01-28 14:53:19,125 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) [2022-01-28 14:53:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1352 transitions. [2022-01-28 14:53:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:19,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:19,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:19,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:19,326 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 [2022-01-28 14:53:19,326 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1805443113, now seen corresponding path program 187 times [2022-01-28 14:53:19,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:19,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244993322] [2022-01-28 14:53:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:19,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:19,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:19,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244993322] [2022-01-28 14:53:19,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244993322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:19,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830491471] [2022-01-28 14:53:19,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:19,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:19,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:19,492 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) [2022-01-28 14:53:19,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-28 14:53:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:19,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:19,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:19,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:19,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:19,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:19,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:19,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:19,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:19,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:20,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:20,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:20,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:20,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:20,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:20,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:20,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830491471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:20,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:20,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:20,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459050775] [2022-01-28 14:53:20,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:20,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:20,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:20,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:20,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:20,107 INFO L87 Difference]: Start difference. First operand 434 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) [2022-01-28 14:53:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:20,440 INFO L93 Difference]: Finished difference Result 624 states and 1886 transitions. [2022-01-28 14:53:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:53:20,441 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 [2022-01-28 14:53:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:20,442 INFO L225 Difference]: With dead ends: 624 [2022-01-28 14:53:20,442 INFO L226 Difference]: Without dead ends: 609 [2022-01-28 14:53:20,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:20,442 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:20,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 206 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 617 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-28 14:53:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-01-28 14:53:20,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 434. [2022-01-28 14:53:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1224018475750577) internal successors, (1352), 433 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) [2022-01-28 14:53:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1352 transitions. [2022-01-28 14:53:20,448 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1352 transitions. Word has length 20 [2022-01-28 14:53:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:20,448 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1352 transitions. [2022-01-28 14:53:20,448 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) [2022-01-28 14:53:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1352 transitions. [2022-01-28 14:53:20,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:20,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:20,448 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:20,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-28 14:53:20,649 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 [2022-01-28 14:53:20,649 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1500463635, now seen corresponding path program 188 times [2022-01-28 14:53:20,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:20,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105240360] [2022-01-28 14:53:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:20,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:20,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:20,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105240360] [2022-01-28 14:53:20,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105240360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:20,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740228348] [2022-01-28 14:53:20,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:20,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:20,791 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) [2022-01-28 14:53:20,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-28 14:53:20,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:20,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:20,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:20,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:20,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:20,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:21,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:21,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:21,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:21,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:21,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:21,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:21,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:21,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:21,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:21,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:21,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:21,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740228348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:21,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:21,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:21,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323561023] [2022-01-28 14:53:21,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:21,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:21,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:21,308 INFO L87 Difference]: Start difference. First operand 434 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) [2022-01-28 14:53:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:21,627 INFO L93 Difference]: Finished difference Result 618 states and 1871 transitions. [2022-01-28 14:53:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:21,628 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 [2022-01-28 14:53:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:21,628 INFO L225 Difference]: With dead ends: 618 [2022-01-28 14:53:21,628 INFO L226 Difference]: Without dead ends: 603 [2022-01-28 14:53:21,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:21,629 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:21,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 219 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 517 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-01-28 14:53:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-28 14:53:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 433. [2022-01-28 14:53:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1180555555555554) internal successors, (1347), 432 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1347 transitions. [2022-01-28 14:53:21,634 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1347 transitions. Word has length 20 [2022-01-28 14:53:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:21,634 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1347 transitions. [2022-01-28 14:53:21,634 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) [2022-01-28 14:53:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1347 transitions. [2022-01-28 14:53:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:21,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:21,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:21,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-28 14:53:21,835 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 [2022-01-28 14:53:21,835 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash 787346711, now seen corresponding path program 189 times [2022-01-28 14:53:21,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:21,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986664495] [2022-01-28 14:53:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:21,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:21,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:21,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986664495] [2022-01-28 14:53:21,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986664495] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:21,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162831436] [2022-01-28 14:53:21,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:21,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:21,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:21,992 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) [2022-01-28 14:53:21,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-28 14:53:22,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:53:22,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:22,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:22,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:22,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:22,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:22,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:22,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:22,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:22,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:22,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:22,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:22,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:22,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:22,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:22,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162831436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:22,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:22,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:22,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103417674] [2022-01-28 14:53:22,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:22,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:22,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:22,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:22,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:22,492 INFO L87 Difference]: Start difference. First operand 433 states and 1347 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) [2022-01-28 14:53:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:22,739 INFO L93 Difference]: Finished difference Result 581 states and 1767 transitions. [2022-01-28 14:53:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:53:22,739 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 [2022-01-28 14:53:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:22,740 INFO L225 Difference]: With dead ends: 581 [2022-01-28 14:53:22,740 INFO L226 Difference]: Without dead ends: 566 [2022-01-28 14:53:22,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:22,740 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:22,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 158 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 501 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-01-28 14:53:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-28 14:53:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 434. [2022-01-28 14:53:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.1224018475750577) internal successors, (1352), 433 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) [2022-01-28 14:53:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1352 transitions. [2022-01-28 14:53:22,746 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1352 transitions. Word has length 20 [2022-01-28 14:53:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:22,746 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1352 transitions. [2022-01-28 14:53:22,746 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) [2022-01-28 14:53:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1352 transitions. [2022-01-28 14:53:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:22,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:22,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:22,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-01-28 14:53:22,947 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 [2022-01-28 14:53:22,947 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash -736460373, now seen corresponding path program 190 times [2022-01-28 14:53:22,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:22,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423508107] [2022-01-28 14:53:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:22,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:23,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423508107] [2022-01-28 14:53:23,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423508107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475493322] [2022-01-28 14:53:23,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:23,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:23,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:23,082 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) [2022-01-28 14:53:23,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-28 14:53:23,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:23,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:23,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:23,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:23,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:23,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:23,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:23,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:23,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:23,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:23,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:23,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:23,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:23,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:23,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:23,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475493322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:23,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:23,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:23,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704927928] [2022-01-28 14:53:23,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:23,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:23,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:23,541 INFO L87 Difference]: Start difference. First operand 434 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) [2022-01-28 14:53:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:23,789 INFO L93 Difference]: Finished difference Result 592 states and 1798 transitions. [2022-01-28 14:53:23,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:23,790 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 [2022-01-28 14:53:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:23,790 INFO L225 Difference]: With dead ends: 592 [2022-01-28 14:53:23,790 INFO L226 Difference]: Without dead ends: 577 [2022-01-28 14:53:23,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:23,791 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:23,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 159 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 506 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-01-28 14:53:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-28 14:53:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 436. [2022-01-28 14:53:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.1264367816091956) internal successors, (1360), 435 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1360 transitions. [2022-01-28 14:53:23,796 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1360 transitions. Word has length 20 [2022-01-28 14:53:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:23,796 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1360 transitions. [2022-01-28 14:53:23,796 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) [2022-01-28 14:53:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1360 transitions. [2022-01-28 14:53:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:23,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:23,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:23,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-28 14:53:23,997 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 [2022-01-28 14:53:23,997 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:23,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1054500883, now seen corresponding path program 191 times [2022-01-28 14:53:23,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:23,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806436653] [2022-01-28 14:53:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:23,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:24,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:24,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806436653] [2022-01-28 14:53:24,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806436653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:24,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886362312] [2022-01-28 14:53:24,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:24,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:24,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:24,148 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) [2022-01-28 14:53:24,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-28 14:53:24,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:53:24,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:24,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:24,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:24,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:24,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:24,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:24,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:24,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:24,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:24,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:24,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:24,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:24,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:24,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886362312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:24,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:24,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:24,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602184876] [2022-01-28 14:53:24,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:24,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:24,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:24,630 INFO L87 Difference]: Start difference. First operand 436 states and 1360 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) [2022-01-28 14:53:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:24,868 INFO L93 Difference]: Finished difference Result 591 states and 1789 transitions. [2022-01-28 14:53:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:24,869 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 [2022-01-28 14:53:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:24,870 INFO L225 Difference]: With dead ends: 591 [2022-01-28 14:53:24,870 INFO L226 Difference]: Without dead ends: 584 [2022-01-28 14:53:24,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:24,870 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:24,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 155 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 467 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-01-28 14:53:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-28 14:53:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 437. [2022-01-28 14:53:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.126146788990826) internal successors, (1363), 436 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1363 transitions. [2022-01-28 14:53:24,875 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1363 transitions. Word has length 20 [2022-01-28 14:53:24,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:24,875 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1363 transitions. [2022-01-28 14:53:24,875 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) [2022-01-28 14:53:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1363 transitions. [2022-01-28 14:53:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:24,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:24,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:24,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-28 14:53:25,076 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 [2022-01-28 14:53:25,076 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:25,077 INFO L85 PathProgramCache]: Analyzing trace with hash -467585281, now seen corresponding path program 192 times [2022-01-28 14:53:25,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:25,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183021648] [2022-01-28 14:53:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:25,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:25,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:25,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183021648] [2022-01-28 14:53:25,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183021648] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:25,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633954591] [2022-01-28 14:53:25,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:25,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:25,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:25,202 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) [2022-01-28 14:53:25,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-28 14:53:25,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:53:25,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:25,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:25,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:25,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:25,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:25,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:25,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:25,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:25,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:25,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:25,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:25,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:25,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:25,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:25,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633954591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:25,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:25,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:25,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642889849] [2022-01-28 14:53:25,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:25,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:25,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:25,711 INFO L87 Difference]: Start difference. First operand 437 states and 1363 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) [2022-01-28 14:53:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:25,929 INFO L93 Difference]: Finished difference Result 636 states and 1898 transitions. [2022-01-28 14:53:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:25,929 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 [2022-01-28 14:53:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:25,930 INFO L225 Difference]: With dead ends: 636 [2022-01-28 14:53:25,930 INFO L226 Difference]: Without dead ends: 606 [2022-01-28 14:53:25,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:25,930 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:25,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 145 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 440 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-01-28 14:53:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-01-28 14:53:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 442. [2022-01-28 14:53:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.113378684807256) internal successors, (1373), 441 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) [2022-01-28 14:53:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1373 transitions. [2022-01-28 14:53:25,936 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1373 transitions. Word has length 20 [2022-01-28 14:53:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:25,936 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1373 transitions. [2022-01-28 14:53:25,936 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) [2022-01-28 14:53:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1373 transitions. [2022-01-28 14:53:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:25,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:25,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:25,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:26,137 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 [2022-01-28 14:53:26,137 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1966863343, now seen corresponding path program 193 times [2022-01-28 14:53:26,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:26,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16279281] [2022-01-28 14:53:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:26,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:26,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:26,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16279281] [2022-01-28 14:53:26,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16279281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:26,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658160384] [2022-01-28 14:53:26,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:26,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:26,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:26,284 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) [2022-01-28 14:53:26,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-28 14:53:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:26,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:26,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:26,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:26,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:26,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:26,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:26,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:26,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:26,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:26,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:26,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:26,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:26,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:26,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:26,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:26,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658160384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:26,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:26,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:26,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976704663] [2022-01-28 14:53:26,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:26,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:26,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:26,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:26,870 INFO L87 Difference]: Start difference. First operand 442 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) [2022-01-28 14:53:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:27,121 INFO L93 Difference]: Finished difference Result 604 states and 1822 transitions. [2022-01-28 14:53:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:27,121 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 [2022-01-28 14:53:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:27,122 INFO L225 Difference]: With dead ends: 604 [2022-01-28 14:53:27,122 INFO L226 Difference]: Without dead ends: 601 [2022-01-28 14:53:27,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:27,122 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:27,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 180 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 563 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-01-28 14:53:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-28 14:53:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 433. [2022-01-28 14:53:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.1180555555555554) internal successors, (1347), 432 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1347 transitions. [2022-01-28 14:53:27,128 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1347 transitions. Word has length 20 [2022-01-28 14:53:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:27,128 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1347 transitions. [2022-01-28 14:53:27,128 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) [2022-01-28 14:53:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1347 transitions. [2022-01-28 14:53:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:27,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:27,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:27,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-28 14:53:27,328 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 [2022-01-28 14:53:27,329 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash -377095553, now seen corresponding path program 194 times [2022-01-28 14:53:27,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:27,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946954083] [2022-01-28 14:53:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:27,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:27,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:27,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946954083] [2022-01-28 14:53:27,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946954083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:27,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601498284] [2022-01-28 14:53:27,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:27,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:27,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:27,445 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) [2022-01-28 14:53:27,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-28 14:53:27,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:27,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:27,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:27,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:27,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:27,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:27,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:27,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:27,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:27,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:27,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:27,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:27,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:27,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:27,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:27,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:27,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:27,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601498284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:27,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:27,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:53:27,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989368670] [2022-01-28 14:53:27,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:27,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:53:27,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:53:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:53:27,971 INFO L87 Difference]: Start difference. First operand 433 states and 1347 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) [2022-01-28 14:53:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:28,194 INFO L93 Difference]: Finished difference Result 581 states and 1770 transitions. [2022-01-28 14:53:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:28,194 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 [2022-01-28 14:53:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:28,195 INFO L225 Difference]: With dead ends: 581 [2022-01-28 14:53:28,195 INFO L226 Difference]: Without dead ends: 566 [2022-01-28 14:53:28,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:28,195 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:28,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 142 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 422 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-01-28 14:53:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-28 14:53:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 435. [2022-01-28 14:53:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1152073732718892) internal successors, (1352), 434 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) [2022-01-28 14:53:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1352 transitions. [2022-01-28 14:53:28,200 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1352 transitions. Word has length 20 [2022-01-28 14:53:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:28,200 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1352 transitions. [2022-01-28 14:53:28,200 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) [2022-01-28 14:53:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1352 transitions. [2022-01-28 14:53:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:28,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:28,201 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] [2022-01-28 14:53:28,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-28 14:53:28,401 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 [2022-01-28 14:53:28,401 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:28,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:28,402 INFO L85 PathProgramCache]: Analyzing trace with hash 611964995, now seen corresponding path program 195 times [2022-01-28 14:53:28,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:28,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430958293] [2022-01-28 14:53:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:28,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:28,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:28,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430958293] [2022-01-28 14:53:28,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430958293] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:28,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064023381] [2022-01-28 14:53:28,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:28,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:28,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:28,514 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) [2022-01-28 14:53:28,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-28 14:53:28,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:53:28,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:28,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:28,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:28,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:28,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:28,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:28,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:28,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:28,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:28,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:28,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:28,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:28,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:28,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:28,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:28,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064023381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:28,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:28,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:53:28,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422309043] [2022-01-28 14:53:28,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:28,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:53:28,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:28,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:53:28,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:53:28,989 INFO L87 Difference]: Start difference. First operand 435 states and 1352 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) [2022-01-28 14:53:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:29,267 INFO L93 Difference]: Finished difference Result 575 states and 1755 transitions. [2022-01-28 14:53:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:29,268 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 [2022-01-28 14:53:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:29,268 INFO L225 Difference]: With dead ends: 575 [2022-01-28 14:53:29,268 INFO L226 Difference]: Without dead ends: 560 [2022-01-28 14:53:29,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:29,269 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:29,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 194 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 589 Invalid, 0 Unknown, 197 Unchecked, 0.2s Time] [2022-01-28 14:53:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-28 14:53:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 435. [2022-01-28 14:53:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.1152073732718892) internal successors, (1352), 434 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) [2022-01-28 14:53:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1352 transitions. [2022-01-28 14:53:29,276 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1352 transitions. Word has length 20 [2022-01-28 14:53:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:29,276 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1352 transitions. [2022-01-28 14:53:29,276 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) [2022-01-28 14:53:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1352 transitions. [2022-01-28 14:53:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:29,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:29,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:29,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-28 14:53:29,495 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 [2022-01-28 14:53:29,495 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 457527477, now seen corresponding path program 196 times [2022-01-28 14:53:29,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:29,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517275106] [2022-01-28 14:53:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:29,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:29,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:29,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517275106] [2022-01-28 14:53:29,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517275106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:29,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628345445] [2022-01-28 14:53:29,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:29,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:29,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:29,604 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) [2022-01-28 14:53:29,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-28 14:53:29,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:29,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:29,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:29,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:29,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:29,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:29,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:29,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:29,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:29,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:29,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:29,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:29,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:29,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:29,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:29,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:30,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628345445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:30,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:30,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:53:30,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081287674] [2022-01-28 14:53:30,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:30,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:53:30,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:53:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:53:30,029 INFO L87 Difference]: Start difference. First operand 435 states and 1352 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) [2022-01-28 14:53:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:30,187 INFO L93 Difference]: Finished difference Result 546 states and 1669 transitions. [2022-01-28 14:53:30,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:53:30,187 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 [2022-01-28 14:53:30,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:30,188 INFO L225 Difference]: With dead ends: 546 [2022-01-28 14:53:30,188 INFO L226 Difference]: Without dead ends: 531 [2022-01-28 14:53:30,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:53:30,188 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:30,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 105 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 358 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-01-28 14:53:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-01-28 14:53:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 437. [2022-01-28 14:53:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.11697247706422) internal successors, (1359), 436 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1359 transitions. [2022-01-28 14:53:30,193 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1359 transitions. Word has length 20 [2022-01-28 14:53:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:30,193 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1359 transitions. [2022-01-28 14:53:30,193 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) [2022-01-28 14:53:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1359 transitions. [2022-01-28 14:53:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:30,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:30,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:30,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-01-28 14:53:30,394 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 [2022-01-28 14:53:30,395 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:30,395 INFO L85 PathProgramCache]: Analyzing trace with hash -422911583, now seen corresponding path program 197 times [2022-01-28 14:53:30,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:30,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370140369] [2022-01-28 14:53:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:30,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:30,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:30,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370140369] [2022-01-28 14:53:30,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370140369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:30,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799629398] [2022-01-28 14:53:30,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:30,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:30,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:30,530 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) [2022-01-28 14:53:30,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-28 14:53:30,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:30,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:30,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:30,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:30,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:30,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:30,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:30,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:30,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:30,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:30,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:30,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:30,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:30,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:30,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:30,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799629398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:30,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:30,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:30,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580551753] [2022-01-28 14:53:30,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:30,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:30,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:30,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:30,993 INFO L87 Difference]: Start difference. First operand 437 states and 1359 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) [2022-01-28 14:53:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:31,224 INFO L93 Difference]: Finished difference Result 610 states and 1839 transitions. [2022-01-28 14:53:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:31,225 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 [2022-01-28 14:53:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:31,226 INFO L225 Difference]: With dead ends: 610 [2022-01-28 14:53:31,226 INFO L226 Difference]: Without dead ends: 595 [2022-01-28 14:53:31,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:31,226 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:31,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 204 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 487 Invalid, 0 Unknown, 261 Unchecked, 0.2s Time] [2022-01-28 14:53:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-28 14:53:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 431. [2022-01-28 14:53:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.116279069767442) internal successors, (1340), 430 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1340 transitions. [2022-01-28 14:53:31,231 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1340 transitions. Word has length 20 [2022-01-28 14:53:31,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:31,232 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1340 transitions. [2022-01-28 14:53:31,232 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) [2022-01-28 14:53:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1340 transitions. [2022-01-28 14:53:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:31,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:31,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:31,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-28 14:53:31,432 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 [2022-01-28 14:53:31,433 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2039824767, now seen corresponding path program 198 times [2022-01-28 14:53:31,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:31,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256312416] [2022-01-28 14:53:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:31,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:31,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:31,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256312416] [2022-01-28 14:53:31,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256312416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:31,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106299947] [2022-01-28 14:53:31,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:31,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:31,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:31,544 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) [2022-01-28 14:53:31,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-28 14:53:31,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:53:31,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:31,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:31,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:31,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:31,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:53:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:31,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:31,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:31,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:31,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:31,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:31,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:31,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:31,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106299947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:31,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:31,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:53:31,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200266544] [2022-01-28 14:53:31,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:31,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:53:31,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:31,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:53:31,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:53:31,893 INFO L87 Difference]: Start difference. First operand 431 states and 1340 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) [2022-01-28 14:53:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:32,407 INFO L93 Difference]: Finished difference Result 752 states and 2268 transitions. [2022-01-28 14:53:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:53:32,407 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 [2022-01-28 14:53:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:32,408 INFO L225 Difference]: With dead ends: 752 [2022-01-28 14:53:32,408 INFO L226 Difference]: Without dead ends: 737 [2022-01-28 14:53:32,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:53:32,408 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:32,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 205 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:53:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-28 14:53:32,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 434. [2022-01-28 14:53:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.115473441108545) internal successors, (1349), 433 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) [2022-01-28 14:53:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1349 transitions. [2022-01-28 14:53:32,414 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1349 transitions. Word has length 20 [2022-01-28 14:53:32,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:32,414 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1349 transitions. [2022-01-28 14:53:32,414 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) [2022-01-28 14:53:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1349 transitions. [2022-01-28 14:53:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:32,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:32,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:32,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-01-28 14:53:32,615 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 [2022-01-28 14:53:32,615 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash -122402727, now seen corresponding path program 199 times [2022-01-28 14:53:32,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:32,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500914777] [2022-01-28 14:53:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:32,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:32,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:32,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500914777] [2022-01-28 14:53:32,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500914777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:32,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159293882] [2022-01-28 14:53:32,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:32,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:32,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:32,737 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) [2022-01-28 14:53:32,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-28 14:53:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:32,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:32,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:32,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:53:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:32,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:33,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:33,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:33,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:33,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:33,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:33,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:33,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159293882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:33,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:33,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:53:33,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237794985] [2022-01-28 14:53:33,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:33,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:53:33,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:33,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:53:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:53:33,151 INFO L87 Difference]: Start difference. First operand 434 states and 1349 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) [2022-01-28 14:53:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:33,486 INFO L93 Difference]: Finished difference Result 655 states and 1983 transitions. [2022-01-28 14:53:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:33,487 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 [2022-01-28 14:53:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:33,488 INFO L225 Difference]: With dead ends: 655 [2022-01-28 14:53:33,488 INFO L226 Difference]: Without dead ends: 640 [2022-01-28 14:53:33,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:33,488 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:33,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 179 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:53:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-28 14:53:33,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 438. [2022-01-28 14:53:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.1189931350114417) internal successors, (1363), 437 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1363 transitions. [2022-01-28 14:53:33,493 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1363 transitions. Word has length 20 [2022-01-28 14:53:33,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:33,493 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1363 transitions. [2022-01-28 14:53:33,493 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) [2022-01-28 14:53:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1363 transitions. [2022-01-28 14:53:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:33,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:33,494 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] [2022-01-28 14:53:33,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-28 14:53:33,694 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 [2022-01-28 14:53:33,694 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash 473703189, now seen corresponding path program 200 times [2022-01-28 14:53:33,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:33,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260201300] [2022-01-28 14:53:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:33,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:33,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260201300] [2022-01-28 14:53:33,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260201300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626025420] [2022-01-28 14:53:33,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:33,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:33,822 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) [2022-01-28 14:53:33,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-28 14:53:33,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:33,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:33,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:33,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:33,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:33,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:53:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:33,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:34,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:34,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:34,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:34,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:34,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:34,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:34,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626025420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:34,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:34,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:53:34,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955500910] [2022-01-28 14:53:34,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:34,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:53:34,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:34,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:53:34,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:53:34,235 INFO L87 Difference]: Start difference. First operand 438 states and 1363 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) [2022-01-28 14:53:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:34,646 INFO L93 Difference]: Finished difference Result 667 states and 2013 transitions. [2022-01-28 14:53:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:34,646 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 [2022-01-28 14:53:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:34,647 INFO L225 Difference]: With dead ends: 667 [2022-01-28 14:53:34,647 INFO L226 Difference]: Without dead ends: 652 [2022-01-28 14:53:34,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:34,647 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:34,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 215 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:53:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-01-28 14:53:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 437. [2022-01-28 14:53:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.114678899082569) internal successors, (1358), 436 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1358 transitions. [2022-01-28 14:53:34,653 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1358 transitions. Word has length 20 [2022-01-28 14:53:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:34,653 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1358 transitions. [2022-01-28 14:53:34,653 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) [2022-01-28 14:53:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1358 transitions. [2022-01-28 14:53:34,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:34,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:34,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:34,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-28 14:53:34,854 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 [2022-01-28 14:53:34,854 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash -18892573, now seen corresponding path program 201 times [2022-01-28 14:53:34,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:34,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516321367] [2022-01-28 14:53:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:34,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:34,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:34,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516321367] [2022-01-28 14:53:34,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516321367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:34,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701542787] [2022-01-28 14:53:34,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:34,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:34,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:34,970 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) [2022-01-28 14:53:34,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-28 14:53:34,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:53:34,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:34,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:35,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:35,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:53:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:35,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:35,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:35,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:35,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:35,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:35,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:35,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:35,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701542787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:35,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:35,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:53:35,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089997549] [2022-01-28 14:53:35,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:35,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:53:35,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:53:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:53:35,367 INFO L87 Difference]: Start difference. First operand 437 states and 1358 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) [2022-01-28 14:53:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:35,654 INFO L93 Difference]: Finished difference Result 630 states and 1908 transitions. [2022-01-28 14:53:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:53:35,655 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 [2022-01-28 14:53:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:35,656 INFO L225 Difference]: With dead ends: 630 [2022-01-28 14:53:35,656 INFO L226 Difference]: Without dead ends: 615 [2022-01-28 14:53:35,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:35,656 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:35,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 166 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:53:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-01-28 14:53:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 431. [2022-01-28 14:53:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.116279069767442) internal successors, (1340), 430 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1340 transitions. [2022-01-28 14:53:35,662 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1340 transitions. Word has length 20 [2022-01-28 14:53:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:35,662 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1340 transitions. [2022-01-28 14:53:35,662 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) [2022-01-28 14:53:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1340 transitions. [2022-01-28 14:53:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:35,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:35,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:35,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:35,884 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 [2022-01-28 14:53:35,884 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash -429125391, now seen corresponding path program 202 times [2022-01-28 14:53:35,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:35,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107163329] [2022-01-28 14:53:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:35,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:35,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107163329] [2022-01-28 14:53:35,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107163329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834625277] [2022-01-28 14:53:35,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:35,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:35,988 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) [2022-01-28 14:53:35,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-28 14:53:36,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:36,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:36,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:36,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:36,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:36,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:36,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:36,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:36,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:36,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:36,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:36,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:36,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:36,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:36,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:36,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:36,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834625277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:36,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:36,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:53:36,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599284685] [2022-01-28 14:53:36,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:36,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:53:36,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:36,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:53:36,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:53:36,472 INFO L87 Difference]: Start difference. First operand 431 states and 1340 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) [2022-01-28 14:53:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:36,809 INFO L93 Difference]: Finished difference Result 646 states and 1957 transitions. [2022-01-28 14:53:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:36,809 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 [2022-01-28 14:53:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:36,810 INFO L225 Difference]: With dead ends: 646 [2022-01-28 14:53:36,810 INFO L226 Difference]: Without dead ends: 616 [2022-01-28 14:53:36,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:36,810 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:36,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 163 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 561 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-01-28 14:53:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-28 14:53:36,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 434. [2022-01-28 14:53:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.115473441108545) internal successors, (1349), 433 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) [2022-01-28 14:53:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1349 transitions. [2022-01-28 14:53:36,816 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1349 transitions. Word has length 20 [2022-01-28 14:53:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:36,817 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1349 transitions. [2022-01-28 14:53:36,817 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) [2022-01-28 14:53:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1349 transitions. [2022-01-28 14:53:36,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:36,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:36,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:36,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:37,039 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 [2022-01-28 14:53:37,039 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1427188591, now seen corresponding path program 203 times [2022-01-28 14:53:37,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:37,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480835203] [2022-01-28 14:53:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:37,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:37,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:37,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480835203] [2022-01-28 14:53:37,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480835203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:37,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733265571] [2022-01-28 14:53:37,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:37,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:37,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:37,172 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) [2022-01-28 14:53:37,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-28 14:53:37,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:53:37,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:37,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:37,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:37,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:37,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:37,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:37,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:37,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:37,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:37,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:37,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:37,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:37,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:37,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:37,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733265571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:37,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:37,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:37,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875282415] [2022-01-28 14:53:37,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:37,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:37,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:37,615 INFO L87 Difference]: Start difference. First operand 434 states and 1349 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) [2022-01-28 14:53:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:38,056 INFO L93 Difference]: Finished difference Result 591 states and 1822 transitions. [2022-01-28 14:53:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:38,057 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 [2022-01-28 14:53:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:38,058 INFO L225 Difference]: With dead ends: 591 [2022-01-28 14:53:38,058 INFO L226 Difference]: Without dead ends: 576 [2022-01-28 14:53:38,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:38,058 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:38,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 257 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 879 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-01-28 14:53:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-28 14:53:38,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 434. [2022-01-28 14:53:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.115473441108545) internal successors, (1349), 433 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) [2022-01-28 14:53:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1349 transitions. [2022-01-28 14:53:38,063 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1349 transitions. Word has length 20 [2022-01-28 14:53:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:38,063 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1349 transitions. [2022-01-28 14:53:38,063 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) [2022-01-28 14:53:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1349 transitions. [2022-01-28 14:53:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:38,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:38,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:38,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-28 14:53:38,264 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 [2022-01-28 14:53:38,264 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2090894449, now seen corresponding path program 204 times [2022-01-28 14:53:38,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:38,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146789097] [2022-01-28 14:53:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:38,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:38,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146789097] [2022-01-28 14:53:38,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146789097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447902109] [2022-01-28 14:53:38,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:38,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:38,394 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) [2022-01-28 14:53:38,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-28 14:53:38,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:53:38,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:38,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:38,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:38,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:38,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:38,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:38,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:38,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:38,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:38,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:38,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:38,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:38,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:38,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:38,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447902109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:38,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:38,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:38,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192650858] [2022-01-28 14:53:38,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:38,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:38,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:38,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:38,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:38,868 INFO L87 Difference]: Start difference. First operand 434 states and 1349 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) [2022-01-28 14:53:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:39,335 INFO L93 Difference]: Finished difference Result 694 states and 2096 transitions. [2022-01-28 14:53:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:53:39,336 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 [2022-01-28 14:53:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:39,337 INFO L225 Difference]: With dead ends: 694 [2022-01-28 14:53:39,337 INFO L226 Difference]: Without dead ends: 679 [2022-01-28 14:53:39,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:53:39,337 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:39,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 258 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 719 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-01-28 14:53:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-28 14:53:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 432. [2022-01-28 14:53:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1183294663573085) internal successors, (1344), 431 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) [2022-01-28 14:53:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1344 transitions. [2022-01-28 14:53:39,343 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1344 transitions. Word has length 20 [2022-01-28 14:53:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:39,343 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1344 transitions. [2022-01-28 14:53:39,343 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) [2022-01-28 14:53:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1344 transitions. [2022-01-28 14:53:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:39,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:39,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:39,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-28 14:53:39,543 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 [2022-01-28 14:53:39,544 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash 870288821, now seen corresponding path program 205 times [2022-01-28 14:53:39,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:39,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355980637] [2022-01-28 14:53:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:39,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:39,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355980637] [2022-01-28 14:53:39,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355980637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539908136] [2022-01-28 14:53:39,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:39,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:39,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:39,679 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) [2022-01-28 14:53:39,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-28 14:53:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:39,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:39,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:39,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:39,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:39,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:39,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:39,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:39,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:39,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:40,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:40,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:40,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:40,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:40,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:40,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:40,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539908136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:40,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:40,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:40,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506999522] [2022-01-28 14:53:40,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:40,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:40,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:40,192 INFO L87 Difference]: Start difference. First operand 432 states and 1344 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) [2022-01-28 14:53:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:40,740 INFO L93 Difference]: Finished difference Result 761 states and 2246 transitions. [2022-01-28 14:53:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:53:40,741 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 [2022-01-28 14:53:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:40,741 INFO L225 Difference]: With dead ends: 761 [2022-01-28 14:53:40,742 INFO L226 Difference]: Without dead ends: 716 [2022-01-28 14:53:40,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:53:40,742 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:40,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 282 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 822 Invalid, 0 Unknown, 213 Unchecked, 0.3s Time] [2022-01-28 14:53:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-28 14:53:40,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 432. [2022-01-28 14:53:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1183294663573085) internal successors, (1344), 431 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) [2022-01-28 14:53:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1344 transitions. [2022-01-28 14:53:40,747 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1344 transitions. Word has length 20 [2022-01-28 14:53:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:40,748 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1344 transitions. [2022-01-28 14:53:40,748 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) [2022-01-28 14:53:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1344 transitions. [2022-01-28 14:53:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:40,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:40,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:40,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-01-28 14:53:40,948 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 [2022-01-28 14:53:40,949 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1177066123, now seen corresponding path program 206 times [2022-01-28 14:53:40,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:40,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326349515] [2022-01-28 14:53:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:40,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:41,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:41,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326349515] [2022-01-28 14:53:41,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326349515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:41,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713602289] [2022-01-28 14:53:41,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:41,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:41,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:41,090 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) [2022-01-28 14:53:41,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-28 14:53:41,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:41,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:41,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:41,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:41,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:41,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:41,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:41,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:41,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:41,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:41,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:41,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:41,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:41,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:41,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:41,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:41,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:41,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713602289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:41,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:41,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:41,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099165597] [2022-01-28 14:53:41,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:41,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:41,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:41,602 INFO L87 Difference]: Start difference. First operand 432 states and 1344 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) [2022-01-28 14:53:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:42,144 INFO L93 Difference]: Finished difference Result 733 states and 2194 transitions. [2022-01-28 14:53:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:53:42,145 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 [2022-01-28 14:53:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:42,146 INFO L225 Difference]: With dead ends: 733 [2022-01-28 14:53:42,146 INFO L226 Difference]: Without dead ends: 703 [2022-01-28 14:53:42,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:53:42,146 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:42,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 260 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 867 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2022-01-28 14:53:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-28 14:53:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 432. [2022-01-28 14:53:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1183294663573085) internal successors, (1344), 431 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) [2022-01-28 14:53:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1344 transitions. [2022-01-28 14:53:42,158 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1344 transitions. Word has length 20 [2022-01-28 14:53:42,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:42,158 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1344 transitions. [2022-01-28 14:53:42,158 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) [2022-01-28 14:53:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1344 transitions. [2022-01-28 14:53:42,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:42,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:42,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:42,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-28 14:53:42,359 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 [2022-01-28 14:53:42,359 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1199967211, now seen corresponding path program 207 times [2022-01-28 14:53:42,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:42,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062061942] [2022-01-28 14:53:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:42,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:42,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062061942] [2022-01-28 14:53:42,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062061942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:42,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497297710] [2022-01-28 14:53:42,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:42,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:42,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:42,498 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) [2022-01-28 14:53:42,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-28 14:53:42,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:53:42,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:42,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:42,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:42,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:42,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:42,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:42,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:42,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:42,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:42,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:42,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:42,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:42,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:42,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:42,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:42,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:42,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497297710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:42,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:42,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:42,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494856783] [2022-01-28 14:53:42,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:42,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:42,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:42,972 INFO L87 Difference]: Start difference. First operand 432 states and 1344 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) [2022-01-28 14:53:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:43,458 INFO L93 Difference]: Finished difference Result 695 states and 2086 transitions. [2022-01-28 14:53:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:53:43,459 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 [2022-01-28 14:53:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:43,460 INFO L225 Difference]: With dead ends: 695 [2022-01-28 14:53:43,460 INFO L226 Difference]: Without dead ends: 665 [2022-01-28 14:53:43,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:53:43,460 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:43,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 251 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 787 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2022-01-28 14:53:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-28 14:53:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 433. [2022-01-28 14:53:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.122685185185185) internal successors, (1349), 432 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) [2022-01-28 14:53:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1349 transitions. [2022-01-28 14:53:43,466 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1349 transitions. Word has length 20 [2022-01-28 14:53:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:43,466 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1349 transitions. [2022-01-28 14:53:43,466 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) [2022-01-28 14:53:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1349 transitions. [2022-01-28 14:53:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:43,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:43,466 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] [2022-01-28 14:53:43,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-01-28 14:53:43,667 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 [2022-01-28 14:53:43,667 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:43,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:43,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1976851467, now seen corresponding path program 208 times [2022-01-28 14:53:43,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:43,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518416073] [2022-01-28 14:53:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:43,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:43,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518416073] [2022-01-28 14:53:43,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518416073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:43,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595479936] [2022-01-28 14:53:43,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:43,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:43,807 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) [2022-01-28 14:53:43,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-28 14:53:43,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:43,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:43,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:43,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:44,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:44,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:44,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:44,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:44,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:44,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:44,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:44,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:44,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:44,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:44,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:44,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595479936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:44,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:44,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:44,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398771554] [2022-01-28 14:53:44,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:44,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:44,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:44,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:44,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:44,318 INFO L87 Difference]: Start difference. First operand 433 states and 1349 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) [2022-01-28 14:53:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:44,657 INFO L93 Difference]: Finished difference Result 682 states and 2057 transitions. [2022-01-28 14:53:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:53:44,657 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 [2022-01-28 14:53:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:44,658 INFO L225 Difference]: With dead ends: 682 [2022-01-28 14:53:44,658 INFO L226 Difference]: Without dead ends: 667 [2022-01-28 14:53:44,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:44,659 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:44,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 283 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 580 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-01-28 14:53:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-28 14:53:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 433. [2022-01-28 14:53:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.122685185185185) internal successors, (1349), 432 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) [2022-01-28 14:53:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1349 transitions. [2022-01-28 14:53:44,664 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1349 transitions. Word has length 20 [2022-01-28 14:53:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:44,665 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1349 transitions. [2022-01-28 14:53:44,665 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) [2022-01-28 14:53:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1349 transitions. [2022-01-28 14:53:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:44,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:44,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:44,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:44,865 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 [2022-01-28 14:53:44,866 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash -603861295, now seen corresponding path program 209 times [2022-01-28 14:53:44,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:44,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52286383] [2022-01-28 14:53:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:44,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:44,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:44,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52286383] [2022-01-28 14:53:44,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52286383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:44,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133967025] [2022-01-28 14:53:44,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:44,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:44,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:44,980 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) [2022-01-28 14:53:44,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-28 14:53:45,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:45,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:45,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:45,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:45,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:45,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:45,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:45,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:45,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:45,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:45,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:53:45,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:45,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:45,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:45,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:45,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133967025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:45,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:45,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:53:45,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201900094] [2022-01-28 14:53:45,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:45,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:53:45,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:53:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:53:45,401 INFO L87 Difference]: Start difference. First operand 433 states and 1349 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) [2022-01-28 14:53:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:45,831 INFO L93 Difference]: Finished difference Result 669 states and 2012 transitions. [2022-01-28 14:53:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:45,831 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 [2022-01-28 14:53:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:45,832 INFO L225 Difference]: With dead ends: 669 [2022-01-28 14:53:45,832 INFO L226 Difference]: Without dead ends: 639 [2022-01-28 14:53:45,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:45,833 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:45,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 204 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 770 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-01-28 14:53:45,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-28 14:53:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 431. [2022-01-28 14:53:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.116279069767442) internal successors, (1340), 430 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1340 transitions. [2022-01-28 14:53:45,838 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1340 transitions. Word has length 20 [2022-01-28 14:53:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:45,838 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1340 transitions. [2022-01-28 14:53:45,838 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) [2022-01-28 14:53:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1340 transitions. [2022-01-28 14:53:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:45,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:45,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:45,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-28 14:53:46,039 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 [2022-01-28 14:53:46,039 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:46,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1515277913, now seen corresponding path program 210 times [2022-01-28 14:53:46,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:46,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464778821] [2022-01-28 14:53:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:46,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:46,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:46,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464778821] [2022-01-28 14:53:46,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464778821] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:46,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388936554] [2022-01-28 14:53:46,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:46,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:46,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:46,179 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) [2022-01-28 14:53:46,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-28 14:53:46,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:53:46,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:46,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:46,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:46,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:46,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:46,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:46,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:46,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:46,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:46,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:46,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:46,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:46,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:46,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:46,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:46,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388936554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:46,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:46,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:46,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074126309] [2022-01-28 14:53:46,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:46,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:46,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:46,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:46,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:46,680 INFO L87 Difference]: Start difference. First operand 431 states and 1340 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) [2022-01-28 14:53:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:46,943 INFO L93 Difference]: Finished difference Result 732 states and 2211 transitions. [2022-01-28 14:53:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:46,943 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 [2022-01-28 14:53:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:46,944 INFO L225 Difference]: With dead ends: 732 [2022-01-28 14:53:46,945 INFO L226 Difference]: Without dead ends: 702 [2022-01-28 14:53:46,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:46,945 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:46,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 152 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 441 Invalid, 0 Unknown, 129 Unchecked, 0.2s Time] [2022-01-28 14:53:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-01-28 14:53:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 433. [2022-01-28 14:53:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.122685185185185) internal successors, (1349), 432 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) [2022-01-28 14:53:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1349 transitions. [2022-01-28 14:53:46,950 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1349 transitions. Word has length 20 [2022-01-28 14:53:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:46,950 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1349 transitions. [2022-01-28 14:53:46,951 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) [2022-01-28 14:53:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1349 transitions. [2022-01-28 14:53:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:46,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:46,951 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] [2022-01-28 14:53:46,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-28 14:53:47,151 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 [2022-01-28 14:53:47,152 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash -593575773, now seen corresponding path program 211 times [2022-01-28 14:53:47,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:47,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975962752] [2022-01-28 14:53:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:47,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:47,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975962752] [2022-01-28 14:53:47,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975962752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221634507] [2022-01-28 14:53:47,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:47,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:47,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:47,289 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) [2022-01-28 14:53:47,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-28 14:53:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:47,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:47,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:47,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:47,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:47,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:47,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:47,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:47,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:47,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:47,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:47,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:47,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:47,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:47,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:47,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:47,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221634507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:47,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:47,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:47,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137126616] [2022-01-28 14:53:47,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:47,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:47,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:47,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:47,791 INFO L87 Difference]: Start difference. First operand 433 states and 1349 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) [2022-01-28 14:53:47,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:47,901 INFO L93 Difference]: Finished difference Result 675 states and 2051 transitions. [2022-01-28 14:53:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:47,901 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 [2022-01-28 14:53:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:47,902 INFO L225 Difference]: With dead ends: 675 [2022-01-28 14:53:47,902 INFO L226 Difference]: Without dead ends: 660 [2022-01-28 14:53:47,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:53:47,903 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:47,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 176 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-01-28 14:53:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-28 14:53:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 440. [2022-01-28 14:53:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.132118451025057) internal successors, (1375), 439 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1375 transitions. [2022-01-28 14:53:47,908 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1375 transitions. Word has length 20 [2022-01-28 14:53:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:47,908 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1375 transitions. [2022-01-28 14:53:47,908 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) [2022-01-28 14:53:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1375 transitions. [2022-01-28 14:53:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:47,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:47,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:47,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-01-28 14:53:48,109 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 [2022-01-28 14:53:48,110 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1346959389, now seen corresponding path program 212 times [2022-01-28 14:53:48,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:48,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815507773] [2022-01-28 14:53:48,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:48,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:48,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815507773] [2022-01-28 14:53:48,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815507773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935211746] [2022-01-28 14:53:48,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:48,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:48,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:48,255 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) [2022-01-28 14:53:48,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-28 14:53:48,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:48,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:48,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:48,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:48,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:48,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:48,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:48,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:48,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:48,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:48,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:48,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:48,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:48,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:48,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:48,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:48,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:48,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935211746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:48,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:48,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:48,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727595788] [2022-01-28 14:53:48,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:48,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:48,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:48,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:48,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:48,756 INFO L87 Difference]: Start difference. First operand 440 states and 1375 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) [2022-01-28 14:53:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:49,054 INFO L93 Difference]: Finished difference Result 662 states and 2002 transitions. [2022-01-28 14:53:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:49,054 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 [2022-01-28 14:53:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:49,055 INFO L225 Difference]: With dead ends: 662 [2022-01-28 14:53:49,055 INFO L226 Difference]: Without dead ends: 647 [2022-01-28 14:53:49,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:49,055 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:49,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 198 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 522 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-01-28 14:53:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-01-28 14:53:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 443. [2022-01-28 14:53:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.1221719457013575) internal successors, (1380), 442 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) [2022-01-28 14:53:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1380 transitions. [2022-01-28 14:53:49,061 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1380 transitions. Word has length 20 [2022-01-28 14:53:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:49,061 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1380 transitions. [2022-01-28 14:53:49,061 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) [2022-01-28 14:53:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1380 transitions. [2022-01-28 14:53:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:49,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:49,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:49,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-28 14:53:49,262 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 [2022-01-28 14:53:49,262 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash 732334439, now seen corresponding path program 213 times [2022-01-28 14:53:49,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:49,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435421694] [2022-01-28 14:53:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:49,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:49,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:49,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435421694] [2022-01-28 14:53:49,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435421694] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:49,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937256924] [2022-01-28 14:53:49,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:49,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:49,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:49,405 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) [2022-01-28 14:53:49,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-28 14:53:49,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:53:49,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:49,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:49,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:49,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:49,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:49,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:49,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:49,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:49,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:49,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:49,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:49,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:49,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:49,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:49,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937256924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:49,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:49,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:49,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203658757] [2022-01-28 14:53:49,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:49,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:49,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:49,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:49,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:49,900 INFO L87 Difference]: Start difference. First operand 443 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) [2022-01-28 14:53:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:50,081 INFO L93 Difference]: Finished difference Result 695 states and 2110 transitions. [2022-01-28 14:53:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:53:50,082 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 [2022-01-28 14:53:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:50,083 INFO L225 Difference]: With dead ends: 695 [2022-01-28 14:53:50,083 INFO L226 Difference]: Without dead ends: 665 [2022-01-28 14:53:50,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:50,083 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:50,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 194 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 331 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2022-01-28 14:53:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-28 14:53:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 449. [2022-01-28 14:53:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.1316964285714284) internal successors, (1403), 448 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1403 transitions. [2022-01-28 14:53:50,088 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1403 transitions. Word has length 20 [2022-01-28 14:53:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:50,089 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1403 transitions. [2022-01-28 14:53:50,089 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) [2022-01-28 14:53:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1403 transitions. [2022-01-28 14:53:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:50,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:50,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:50,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-01-28 14:53:50,289 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 [2022-01-28 14:53:50,290 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:50,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1508657261, now seen corresponding path program 214 times [2022-01-28 14:53:50,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:50,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581647497] [2022-01-28 14:53:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:50,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:50,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:50,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581647497] [2022-01-28 14:53:50,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581647497] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:50,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620528418] [2022-01-28 14:53:50,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:50,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:50,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:50,421 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) [2022-01-28 14:53:50,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-28 14:53:50,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:50,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:50,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:50,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:50,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:50,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:50,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:50,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:50,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:50,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:50,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:50,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:50,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:50,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:50,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:50,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:50,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:50,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620528418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:50,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:50,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:50,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407347734] [2022-01-28 14:53:50,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:50,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:50,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:50,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:50,932 INFO L87 Difference]: Start difference. First operand 449 states and 1403 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) [2022-01-28 14:53:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:51,269 INFO L93 Difference]: Finished difference Result 696 states and 2120 transitions. [2022-01-28 14:53:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:53:51,269 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 [2022-01-28 14:53:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:51,270 INFO L225 Difference]: With dead ends: 696 [2022-01-28 14:53:51,270 INFO L226 Difference]: Without dead ends: 681 [2022-01-28 14:53:51,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:51,271 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:51,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 198 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 595 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-01-28 14:53:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-28 14:53:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 453. [2022-01-28 14:53:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1349557522123894) internal successors, (1417), 452 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1417 transitions. [2022-01-28 14:53:51,276 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1417 transitions. Word has length 20 [2022-01-28 14:53:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:51,276 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1417 transitions. [2022-01-28 14:53:51,276 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) [2022-01-28 14:53:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1417 transitions. [2022-01-28 14:53:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:51,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:51,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:51,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-28 14:53:51,477 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 [2022-01-28 14:53:51,478 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2032926419, now seen corresponding path program 215 times [2022-01-28 14:53:51,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:51,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404931539] [2022-01-28 14:53:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:51,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:51,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:51,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404931539] [2022-01-28 14:53:51,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404931539] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:51,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309306230] [2022-01-28 14:53:51,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:51,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:51,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:51,606 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) [2022-01-28 14:53:51,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-28 14:53:51,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:51,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:51,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:51,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:51,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:51,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:51,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:51,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:51,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:51,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:51,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:51,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:51,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:52,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:52,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:52,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:52,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:52,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309306230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:52,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:52,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:52,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065330249] [2022-01-28 14:53:52,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:52,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:52,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:52,096 INFO L87 Difference]: Start difference. First operand 453 states and 1417 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) [2022-01-28 14:53:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:52,441 INFO L93 Difference]: Finished difference Result 740 states and 2262 transitions. [2022-01-28 14:53:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:52,441 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 [2022-01-28 14:53:52,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:52,442 INFO L225 Difference]: With dead ends: 740 [2022-01-28 14:53:52,442 INFO L226 Difference]: Without dead ends: 733 [2022-01-28 14:53:52,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:52,443 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:52,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 277 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 685 Invalid, 0 Unknown, 370 Unchecked, 0.3s Time] [2022-01-28 14:53:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-28 14:53:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 452. [2022-01-28 14:53:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.12860310421286) internal successors, (1411), 451 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1411 transitions. [2022-01-28 14:53:52,448 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1411 transitions. Word has length 20 [2022-01-28 14:53:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:52,448 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1411 transitions. [2022-01-28 14:53:52,449 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) [2022-01-28 14:53:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1411 transitions. [2022-01-28 14:53:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:52,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:52,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:52,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-01-28 14:53:52,651 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 [2022-01-28 14:53:52,651 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:52,651 INFO L85 PathProgramCache]: Analyzing trace with hash -182747049, now seen corresponding path program 216 times [2022-01-28 14:53:52,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:52,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88565780] [2022-01-28 14:53:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:52,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:52,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:52,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88565780] [2022-01-28 14:53:52,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88565780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:52,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947633208] [2022-01-28 14:53:52,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:52,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:52,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:52,784 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) [2022-01-28 14:53:52,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-28 14:53:52,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:53:52,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:52,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:52,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:52,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:52,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:52,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:52,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:52,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:52,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:53,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:53,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:53,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:53,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:53,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:53,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:53,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:53,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947633208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:53,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:53,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:53,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758101356] [2022-01-28 14:53:53,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:53,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:53,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:53,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:53,271 INFO L87 Difference]: Start difference. First operand 452 states and 1411 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) [2022-01-28 14:53:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:53,619 INFO L93 Difference]: Finished difference Result 716 states and 2166 transitions. [2022-01-28 14:53:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:53:53,619 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 [2022-01-28 14:53:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:53,625 INFO L225 Difference]: With dead ends: 716 [2022-01-28 14:53:53,625 INFO L226 Difference]: Without dead ends: 686 [2022-01-28 14:53:53,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:53:53,625 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:53,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 187 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 602 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-01-28 14:53:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-28 14:53:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 452. [2022-01-28 14:53:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.12860310421286) internal successors, (1411), 451 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1411 transitions. [2022-01-28 14:53:53,631 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1411 transitions. Word has length 20 [2022-01-28 14:53:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:53,631 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1411 transitions. [2022-01-28 14:53:53,631 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) [2022-01-28 14:53:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1411 transitions. [2022-01-28 14:53:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:53,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:53,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:53,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-01-28 14:53:53,832 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 [2022-01-28 14:53:53,832 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:53,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:53,833 INFO L85 PathProgramCache]: Analyzing trace with hash -698684651, now seen corresponding path program 217 times [2022-01-28 14:53:53,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:53,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535502084] [2022-01-28 14:53:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:53,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:53,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:53,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535502084] [2022-01-28 14:53:53,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535502084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:53,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111963096] [2022-01-28 14:53:53,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:53:53,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:53,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:53,966 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) [2022-01-28 14:53:53,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-28 14:53:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:53,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:54,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:54,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:54,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:54,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:54,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:54,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:54,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:54,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:54,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:54,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:54,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:54,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:54,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:54,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111963096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:54,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:54,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:54,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423644771] [2022-01-28 14:53:54,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:54,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:54,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:54,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:54,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:54,453 INFO L87 Difference]: Start difference. First operand 452 states and 1411 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) [2022-01-28 14:53:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:54,678 INFO L93 Difference]: Finished difference Result 677 states and 2058 transitions. [2022-01-28 14:53:54,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:53:54,678 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 [2022-01-28 14:53:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:54,679 INFO L225 Difference]: With dead ends: 677 [2022-01-28 14:53:54,679 INFO L226 Difference]: Without dead ends: 670 [2022-01-28 14:53:54,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:53:54,679 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:54,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 220 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 494 Invalid, 0 Unknown, 204 Unchecked, 0.2s Time] [2022-01-28 14:53:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-28 14:53:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 455. [2022-01-28 14:53:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1255506607929515) internal successors, (1419), 454 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1419 transitions. [2022-01-28 14:53:54,685 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1419 transitions. Word has length 20 [2022-01-28 14:53:54,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:54,685 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1419 transitions. [2022-01-28 14:53:54,685 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) [2022-01-28 14:53:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1419 transitions. [2022-01-28 14:53:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:54,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:54,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:54,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-01-28 14:53:54,886 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 [2022-01-28 14:53:54,886 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1447486109, now seen corresponding path program 218 times [2022-01-28 14:53:54,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:54,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085739786] [2022-01-28 14:53:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:54,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:55,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:55,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085739786] [2022-01-28 14:53:55,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085739786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:55,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511224461] [2022-01-28 14:53:55,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:53:55,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:55,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:55,015 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) [2022-01-28 14:53:55,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-28 14:53:55,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:55,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:55,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:55,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:55,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:55,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:55,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:55,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:55,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:55,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:55,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:55,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:55,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:55,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:55,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:55,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:55,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511224461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:55,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:55,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:55,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274195765] [2022-01-28 14:53:55,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:55,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:55,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:55,521 INFO L87 Difference]: Start difference. First operand 455 states and 1419 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) [2022-01-28 14:53:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:55,774 INFO L93 Difference]: Finished difference Result 637 states and 1930 transitions. [2022-01-28 14:53:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:55,774 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 [2022-01-28 14:53:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:55,775 INFO L225 Difference]: With dead ends: 637 [2022-01-28 14:53:55,775 INFO L226 Difference]: Without dead ends: 607 [2022-01-28 14:53:55,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:55,775 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:55,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 135 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 435 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-01-28 14:53:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-28 14:53:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 459. [2022-01-28 14:53:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.1331877729257642) internal successors, (1435), 458 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1435 transitions. [2022-01-28 14:53:55,781 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1435 transitions. Word has length 20 [2022-01-28 14:53:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:55,781 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1435 transitions. [2022-01-28 14:53:55,781 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) [2022-01-28 14:53:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1435 transitions. [2022-01-28 14:53:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:55,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:55,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:55,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-01-28 14:53:55,982 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 [2022-01-28 14:53:55,982 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:55,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:55,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2034401711, now seen corresponding path program 219 times [2022-01-28 14:53:55,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:55,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894056139] [2022-01-28 14:53:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:55,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:56,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:56,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894056139] [2022-01-28 14:53:56,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894056139] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:56,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424716953] [2022-01-28 14:53:56,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:53:56,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:56,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:56,105 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) [2022-01-28 14:53:56,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-28 14:53:56,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:53:56,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:56,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:56,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:56,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:56,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:56,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:56,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:56,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:56,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:56,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:56,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:56,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:56,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:56,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:56,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:56,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424716953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:56,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:56,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:56,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915326540] [2022-01-28 14:53:56,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:56,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:56,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:56,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:56,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:56,646 INFO L87 Difference]: Start difference. First operand 459 states and 1435 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) [2022-01-28 14:53:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:56,845 INFO L93 Difference]: Finished difference Result 651 states and 1956 transitions. [2022-01-28 14:53:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:56,845 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 [2022-01-28 14:53:56,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:56,846 INFO L225 Difference]: With dead ends: 651 [2022-01-28 14:53:56,846 INFO L226 Difference]: Without dead ends: 621 [2022-01-28 14:53:56,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:56,846 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:56,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 191 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 365 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-01-28 14:53:56,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-28 14:53:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 467. [2022-01-28 14:53:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.124463519313305) internal successors, (1456), 466 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1456 transitions. [2022-01-28 14:53:56,852 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1456 transitions. Word has length 20 [2022-01-28 14:53:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:56,852 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1456 transitions. [2022-01-28 14:53:56,852 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) [2022-01-28 14:53:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1456 transitions. [2022-01-28 14:53:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:56,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:56,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:56,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-01-28 14:53:57,053 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 [2022-01-28 14:53:57,053 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1359019783, now seen corresponding path program 220 times [2022-01-28 14:53:57,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:57,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435508027] [2022-01-28 14:53:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:57,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:57,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:57,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435508027] [2022-01-28 14:53:57,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435508027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:57,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442358051] [2022-01-28 14:53:57,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:53:57,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:57,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:57,176 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) [2022-01-28 14:53:57,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-28 14:53:57,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:53:57,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:57,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:57,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:57,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:57,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:57,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:57,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:57,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:57,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:57,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:57,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:57,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:57,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:57,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:57,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:57,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442358051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:57,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:57,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:57,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237599363] [2022-01-28 14:53:57,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:57,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:57,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:57,772 INFO L87 Difference]: Start difference. First operand 467 states and 1456 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) [2022-01-28 14:53:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:58,064 INFO L93 Difference]: Finished difference Result 641 states and 1924 transitions. [2022-01-28 14:53:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:53:58,064 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 [2022-01-28 14:53:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:58,065 INFO L225 Difference]: With dead ends: 641 [2022-01-28 14:53:58,065 INFO L226 Difference]: Without dead ends: 627 [2022-01-28 14:53:58,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:53:58,065 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:58,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 217 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 654 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-01-28 14:53:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-01-28 14:53:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 455. [2022-01-28 14:53:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.1343612334801763) internal successors, (1423), 454 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1423 transitions. [2022-01-28 14:53:58,071 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1423 transitions. Word has length 20 [2022-01-28 14:53:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:58,071 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1423 transitions. [2022-01-28 14:53:58,071 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) [2022-01-28 14:53:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1423 transitions. [2022-01-28 14:53:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:58,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:58,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:53:58,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-28 14:53:58,272 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 [2022-01-28 14:53:58,273 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash -710863579, now seen corresponding path program 221 times [2022-01-28 14:53:58,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:58,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562430795] [2022-01-28 14:53:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:58,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:58,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562430795] [2022-01-28 14:53:58,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562430795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821989138] [2022-01-28 14:53:58,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:53:58,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:58,402 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) [2022-01-28 14:53:58,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-28 14:53:58,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:53:58,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:58,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:58,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:58,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:58,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:58,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:58,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:58,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:58,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:58,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:53:58,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:58,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:53:58,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:58,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:53:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:58,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821989138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:53:58,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:53:58,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:53:58,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101033886] [2022-01-28 14:53:58,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:53:58,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:53:58,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:53:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:53:58,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:53:58,919 INFO L87 Difference]: Start difference. First operand 455 states and 1423 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) [2022-01-28 14:53:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:53:59,214 INFO L93 Difference]: Finished difference Result 613 states and 1870 transitions. [2022-01-28 14:53:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:53:59,214 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 [2022-01-28 14:53:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:53:59,215 INFO L225 Difference]: With dead ends: 613 [2022-01-28 14:53:59,215 INFO L226 Difference]: Without dead ends: 598 [2022-01-28 14:53:59,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:53:59,215 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:53:59,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 174 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 580 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-01-28 14:53:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-01-28 14:53:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 457. [2022-01-28 14:53:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.138157894736842) internal successors, (1431), 456 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:53:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1431 transitions. [2022-01-28 14:53:59,221 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1431 transitions. Word has length 20 [2022-01-28 14:53:59,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:53:59,221 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 1431 transitions. [2022-01-28 14:53:59,221 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) [2022-01-28 14:53:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1431 transitions. [2022-01-28 14:53:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:53:59,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:53:59,222 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] [2022-01-28 14:53:59,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-01-28 14:53:59,422 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 [2022-01-28 14:53:59,422 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:53:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:53:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1028904089, now seen corresponding path program 222 times [2022-01-28 14:53:59,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:53:59,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206197338] [2022-01-28 14:53:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:53:59,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:53:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:53:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:59,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:53:59,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206197338] [2022-01-28 14:53:59,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206197338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:53:59,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096416938] [2022-01-28 14:53:59,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:53:59,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:53:59,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:53:59,552 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) [2022-01-28 14:53:59,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-28 14:53:59,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:53:59,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:53:59,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:53:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:53:59,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:59,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:53:59,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:59,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:59,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:53:59,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:53:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:53:59,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:53:59,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:53:59,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:00,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:00,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:00,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:00,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:00,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096416938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:00,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:00,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:00,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024011792] [2022-01-28 14:54:00,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:00,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:00,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:00,100 INFO L87 Difference]: Start difference. First operand 457 states and 1431 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) [2022-01-28 14:54:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:00,325 INFO L93 Difference]: Finished difference Result 678 states and 2066 transitions. [2022-01-28 14:54:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:54:00,325 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 [2022-01-28 14:54:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:00,326 INFO L225 Difference]: With dead ends: 678 [2022-01-28 14:54:00,326 INFO L226 Difference]: Without dead ends: 671 [2022-01-28 14:54:00,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:00,326 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:00,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 198 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 478 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-28 14:54:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-28 14:54:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 461. [2022-01-28 14:54:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.1456521739130436) internal successors, (1447), 460 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1447 transitions. [2022-01-28 14:54:00,332 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1447 transitions. Word has length 20 [2022-01-28 14:54:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:00,332 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1447 transitions. [2022-01-28 14:54:00,332 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) [2022-01-28 14:54:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1447 transitions. [2022-01-28 14:54:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:00,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:00,333 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] [2022-01-28 14:54:00,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-28 14:54:00,533 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 [2022-01-28 14:54:00,533 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash -441988487, now seen corresponding path program 223 times [2022-01-28 14:54:00,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:00,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319305948] [2022-01-28 14:54:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:00,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:00,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:00,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319305948] [2022-01-28 14:54:00,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319305948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:00,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285633437] [2022-01-28 14:54:00,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:00,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:00,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:00,660 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) [2022-01-28 14:54:00,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-28 14:54:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:00,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:00,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:00,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:00,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:00,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:00,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:00,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:01,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:01,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:01,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:01,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:01,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:01,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:01,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:01,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285633437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:01,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:01,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:01,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153863778] [2022-01-28 14:54:01,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:01,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:01,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:01,253 INFO L87 Difference]: Start difference. First operand 461 states and 1447 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) [2022-01-28 14:54:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:01,499 INFO L93 Difference]: Finished difference Result 661 states and 1983 transitions. [2022-01-28 14:54:01,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:54:01,500 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 [2022-01-28 14:54:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:01,500 INFO L225 Difference]: With dead ends: 661 [2022-01-28 14:54:01,501 INFO L226 Difference]: Without dead ends: 631 [2022-01-28 14:54:01,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:54:01,501 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:01,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 167 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 520 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-01-28 14:54:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-01-28 14:54:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 464. [2022-01-28 14:54:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.127429805615551) internal successors, (1448), 463 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1448 transitions. [2022-01-28 14:54:01,506 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1448 transitions. Word has length 20 [2022-01-28 14:54:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:01,507 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1448 transitions. [2022-01-28 14:54:01,507 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) [2022-01-28 14:54:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1448 transitions. [2022-01-28 14:54:01,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:01,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:01,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:01,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-01-28 14:54:01,708 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 [2022-01-28 14:54:01,708 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1117370415, now seen corresponding path program 224 times [2022-01-28 14:54:01,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:01,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340458352] [2022-01-28 14:54:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:01,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:01,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340458352] [2022-01-28 14:54:01,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340458352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:01,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140597459] [2022-01-28 14:54:01,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:01,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:01,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:01,835 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) [2022-01-28 14:54:01,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-28 14:54:01,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:01,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:01,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:01,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:01,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:01,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:02,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:02,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:02,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:02,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:02,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:02,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:02,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:02,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:02,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:02,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:02,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:02,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140597459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:02,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:02,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:02,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112408400] [2022-01-28 14:54:02,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:02,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:02,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:02,474 INFO L87 Difference]: Start difference. First operand 464 states and 1448 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) [2022-01-28 14:54:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:02,698 INFO L93 Difference]: Finished difference Result 627 states and 1891 transitions. [2022-01-28 14:54:02,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:54:02,698 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 [2022-01-28 14:54:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:02,699 INFO L225 Difference]: With dead ends: 627 [2022-01-28 14:54:02,699 INFO L226 Difference]: Without dead ends: 621 [2022-01-28 14:54:02,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:54:02,699 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:02,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 241 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 475 Invalid, 0 Unknown, 243 Unchecked, 0.2s Time] [2022-01-28 14:54:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-28 14:54:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 451. [2022-01-28 14:54:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.1266666666666665) internal successors, (1407), 450 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1407 transitions. [2022-01-28 14:54:02,705 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1407 transitions. Word has length 20 [2022-01-28 14:54:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:02,705 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 1407 transitions. [2022-01-28 14:54:02,705 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) [2022-01-28 14:54:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1407 transitions. [2022-01-28 14:54:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:02,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:02,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:02,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-01-28 14:54:02,906 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 [2022-01-28 14:54:02,906 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash -351344739, now seen corresponding path program 225 times [2022-01-28 14:54:02,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:02,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497572802] [2022-01-28 14:54:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:02,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:03,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:03,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497572802] [2022-01-28 14:54:03,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497572802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:03,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933976319] [2022-01-28 14:54:03,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:03,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:03,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:03,043 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) [2022-01-28 14:54:03,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-28 14:54:03,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:54:03,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:03,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:03,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:03,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:03,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:03,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:03,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:03,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:03,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:03,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:03,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:03,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:03,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:03,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:03,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:03,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:03,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933976319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:03,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:03,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:03,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610658076] [2022-01-28 14:54:03,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:03,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:03,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:03,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:03,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:03,511 INFO L87 Difference]: Start difference. First operand 451 states and 1407 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) [2022-01-28 14:54:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:03,886 INFO L93 Difference]: Finished difference Result 635 states and 1937 transitions. [2022-01-28 14:54:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:54:03,886 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 [2022-01-28 14:54:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:03,887 INFO L225 Difference]: With dead ends: 635 [2022-01-28 14:54:03,887 INFO L226 Difference]: Without dead ends: 620 [2022-01-28 14:54:03,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:54:03,887 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:03,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 226 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 613 Invalid, 0 Unknown, 269 Unchecked, 0.2s Time] [2022-01-28 14:54:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-01-28 14:54:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 453. [2022-01-28 14:54:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1327433628318584) internal successors, (1416), 452 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1416 transitions. [2022-01-28 14:54:03,893 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1416 transitions. Word has length 20 [2022-01-28 14:54:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:03,893 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1416 transitions. [2022-01-28 14:54:03,893 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) [2022-01-28 14:54:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1416 transitions. [2022-01-28 14:54:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:03,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:03,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:03,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-28 14:54:04,094 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 [2022-01-28 14:54:04,094 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:04,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1128228995, now seen corresponding path program 226 times [2022-01-28 14:54:04,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:04,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707832371] [2022-01-28 14:54:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:04,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:04,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:04,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707832371] [2022-01-28 14:54:04,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707832371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:04,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725330432] [2022-01-28 14:54:04,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:04,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:04,229 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) [2022-01-28 14:54:04,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-28 14:54:04,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:04,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:04,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:04,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:04,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:04,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:04,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:04,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:04,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:04,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:04,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:04,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:04,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:04,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:04,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:04,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:04,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725330432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:04,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:04,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:04,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988636508] [2022-01-28 14:54:04,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:04,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:04,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:04,717 INFO L87 Difference]: Start difference. First operand 453 states and 1416 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) [2022-01-28 14:54:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:05,040 INFO L93 Difference]: Finished difference Result 654 states and 1985 transitions. [2022-01-28 14:54:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:54:05,040 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 [2022-01-28 14:54:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:05,041 INFO L225 Difference]: With dead ends: 654 [2022-01-28 14:54:05,041 INFO L226 Difference]: Without dead ends: 639 [2022-01-28 14:54:05,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:54:05,042 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:05,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 193 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 515 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-01-28 14:54:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-28 14:54:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 453. [2022-01-28 14:54:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1327433628318584) internal successors, (1416), 452 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1416 transitions. [2022-01-28 14:54:05,047 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1416 transitions. Word has length 20 [2022-01-28 14:54:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:05,047 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1416 transitions. [2022-01-28 14:54:05,047 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) [2022-01-28 14:54:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1416 transitions. [2022-01-28 14:54:05,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:05,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:05,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:05,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-28 14:54:05,248 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 [2022-01-28 14:54:05,248 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash 244761177, now seen corresponding path program 227 times [2022-01-28 14:54:05,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:05,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308306486] [2022-01-28 14:54:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:05,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:05,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:05,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308306486] [2022-01-28 14:54:05,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308306486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:05,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954199627] [2022-01-28 14:54:05,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:05,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:05,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:05,389 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) [2022-01-28 14:54:05,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-28 14:54:05,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:54:05,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:05,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:05,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:05,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:05,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:05,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:05,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:05,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:05,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:05,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:05,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:05,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:05,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:05,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:05,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954199627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:05,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:05,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:05,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308033834] [2022-01-28 14:54:05,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:05,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:05,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:05,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:05,861 INFO L87 Difference]: Start difference. First operand 453 states and 1416 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) [2022-01-28 14:54:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:06,263 INFO L93 Difference]: Finished difference Result 633 states and 1930 transitions. [2022-01-28 14:54:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:54:06,263 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 [2022-01-28 14:54:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:06,264 INFO L225 Difference]: With dead ends: 633 [2022-01-28 14:54:06,264 INFO L226 Difference]: Without dead ends: 618 [2022-01-28 14:54:06,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:54:06,264 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:06,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 193 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 604 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-01-28 14:54:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-28 14:54:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 453. [2022-01-28 14:54:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1327433628318584) internal successors, (1416), 452 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1416 transitions. [2022-01-28 14:54:06,269 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1416 transitions. Word has length 20 [2022-01-28 14:54:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:06,270 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1416 transitions. [2022-01-28 14:54:06,270 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) [2022-01-28 14:54:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1416 transitions. [2022-01-28 14:54:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:06,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:06,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:06,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:06,470 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 [2022-01-28 14:54:06,471 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:06,471 INFO L85 PathProgramCache]: Analyzing trace with hash 770261817, now seen corresponding path program 228 times [2022-01-28 14:54:06,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:06,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317353358] [2022-01-28 14:54:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:06,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:06,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:06,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317353358] [2022-01-28 14:54:06,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317353358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:06,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840862926] [2022-01-28 14:54:06,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:06,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:06,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:06,616 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) [2022-01-28 14:54:06,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-28 14:54:06,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:54:06,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:06,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:06,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:06,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:06,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:06,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:06,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:06,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:06,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:06,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:06,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:06,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:07,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:07,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:07,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:07,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:07,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840862926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:07,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:07,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:07,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700272336] [2022-01-28 14:54:07,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:07,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:07,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:07,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:07,112 INFO L87 Difference]: Start difference. First operand 453 states and 1416 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) [2022-01-28 14:54:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:07,423 INFO L93 Difference]: Finished difference Result 647 states and 1963 transitions. [2022-01-28 14:54:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:54:07,424 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 [2022-01-28 14:54:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:07,425 INFO L225 Difference]: With dead ends: 647 [2022-01-28 14:54:07,425 INFO L226 Difference]: Without dead ends: 632 [2022-01-28 14:54:07,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:54:07,425 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:07,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 196 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 477 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-01-28 14:54:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-01-28 14:54:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 453. [2022-01-28 14:54:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1327433628318584) internal successors, (1416), 452 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:07,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1416 transitions. [2022-01-28 14:54:07,431 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1416 transitions. Word has length 20 [2022-01-28 14:54:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:07,431 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1416 transitions. [2022-01-28 14:54:07,431 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) [2022-01-28 14:54:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1416 transitions. [2022-01-28 14:54:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:07,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:07,432 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] [2022-01-28 14:54:07,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-28 14:54:07,632 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 [2022-01-28 14:54:07,632 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:07,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:07,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1759322365, now seen corresponding path program 229 times [2022-01-28 14:54:07,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:07,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670374750] [2022-01-28 14:54:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:07,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:07,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670374750] [2022-01-28 14:54:07,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670374750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797993057] [2022-01-28 14:54:07,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:07,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:07,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:07,803 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) [2022-01-28 14:54:07,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-28 14:54:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:07,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:07,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:07,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:07,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:07,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:07,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:08,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:08,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:08,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:08,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:08,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:08,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:08,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:08,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797993057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:08,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:08,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:08,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348981941] [2022-01-28 14:54:08,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:08,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:08,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:08,291 INFO L87 Difference]: Start difference. First operand 453 states and 1416 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) [2022-01-28 14:54:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:08,611 INFO L93 Difference]: Finished difference Result 641 states and 1948 transitions. [2022-01-28 14:54:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:54:08,611 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 [2022-01-28 14:54:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:08,612 INFO L225 Difference]: With dead ends: 641 [2022-01-28 14:54:08,612 INFO L226 Difference]: Without dead ends: 626 [2022-01-28 14:54:08,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:54:08,612 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:08,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 194 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 447 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2022-01-28 14:54:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-28 14:54:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 452. [2022-01-28 14:54:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.12860310421286) internal successors, (1411), 451 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1411 transitions. [2022-01-28 14:54:08,618 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1411 transitions. Word has length 20 [2022-01-28 14:54:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:08,618 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1411 transitions. [2022-01-28 14:54:08,618 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) [2022-01-28 14:54:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1411 transitions. [2022-01-28 14:54:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:08,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:08,619 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:08,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-01-28 14:54:08,819 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 [2022-01-28 14:54:08,819 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -247834585, now seen corresponding path program 230 times [2022-01-28 14:54:08,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:08,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36955431] [2022-01-28 14:54:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:08,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:08,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:08,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36955431] [2022-01-28 14:54:08,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36955431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:08,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268627220] [2022-01-28 14:54:08,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:08,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:08,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:08,952 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) [2022-01-28 14:54:08,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-28 14:54:08,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:08,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:08,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:08,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:09,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:09,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:09,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:09,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:09,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:09,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:09,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:09,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:09,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:09,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:09,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:09,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:09,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:09,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268627220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:09,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:09,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:09,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026388494] [2022-01-28 14:54:09,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:09,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:09,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:09,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:09,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:09,461 INFO L87 Difference]: Start difference. First operand 452 states and 1411 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) [2022-01-28 14:54:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:09,783 INFO L93 Difference]: Finished difference Result 600 states and 1832 transitions. [2022-01-28 14:54:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:54:09,783 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 [2022-01-28 14:54:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:09,784 INFO L225 Difference]: With dead ends: 600 [2022-01-28 14:54:09,784 INFO L226 Difference]: Without dead ends: 585 [2022-01-28 14:54:09,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:54:09,784 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:09,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 180 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 652 Invalid, 0 Unknown, 178 Unchecked, 0.2s Time] [2022-01-28 14:54:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-28 14:54:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 453. [2022-01-28 14:54:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.1327433628318584) internal successors, (1416), 452 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1416 transitions. [2022-01-28 14:54:09,790 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1416 transitions. Word has length 20 [2022-01-28 14:54:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:09,790 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1416 transitions. [2022-01-28 14:54:09,790 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) [2022-01-28 14:54:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1416 transitions. [2022-01-28 14:54:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:09,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:09,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:09,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-01-28 14:54:09,991 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 [2022-01-28 14:54:09,991 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:09,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1771641669, now seen corresponding path program 231 times [2022-01-28 14:54:09,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:09,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831813707] [2022-01-28 14:54:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:09,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:10,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:10,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831813707] [2022-01-28 14:54:10,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831813707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:10,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064022932] [2022-01-28 14:54:10,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:10,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:10,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:10,122 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) [2022-01-28 14:54:10,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-28 14:54:10,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:54:10,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:10,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:10,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:10,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:10,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:10,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:10,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:10,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:10,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:10,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:10,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:10,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:10,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:10,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:10,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:10,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:10,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064022932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:10,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:10,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:10,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027724905] [2022-01-28 14:54:10,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:10,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:10,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:10,639 INFO L87 Difference]: Start difference. First operand 453 states and 1416 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) [2022-01-28 14:54:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:10,955 INFO L93 Difference]: Finished difference Result 612 states and 1866 transitions. [2022-01-28 14:54:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:54:10,956 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 [2022-01-28 14:54:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:10,957 INFO L225 Difference]: With dead ends: 612 [2022-01-28 14:54:10,958 INFO L226 Difference]: Without dead ends: 597 [2022-01-28 14:54:10,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:54:10,958 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:10,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 217 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 653 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-01-28 14:54:10,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-01-28 14:54:10,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 456. [2022-01-28 14:54:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1362637362637362) internal successors, (1427), 455 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1427 transitions. [2022-01-28 14:54:10,965 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1427 transitions. Word has length 20 [2022-01-28 14:54:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:10,965 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1427 transitions. [2022-01-28 14:54:10,965 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) [2022-01-28 14:54:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1427 transitions. [2022-01-28 14:54:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:10,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:10,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:10,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-28 14:54:11,166 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 [2022-01-28 14:54:11,166 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1502766577, now seen corresponding path program 232 times [2022-01-28 14:54:11,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:11,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148856465] [2022-01-28 14:54:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:11,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:11,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:11,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148856465] [2022-01-28 14:54:11,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148856465] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:11,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943761617] [2022-01-28 14:54:11,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:11,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:11,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:11,290 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) [2022-01-28 14:54:11,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-28 14:54:11,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:11,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:11,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:11,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:11,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:11,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:11,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:11,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:11,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:11,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:11,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:11,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:11,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:11,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:11,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:11,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:11,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943761617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:11,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:11,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:11,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774308782] [2022-01-28 14:54:11,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:11,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:11,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:11,898 INFO L87 Difference]: Start difference. First operand 456 states and 1427 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) [2022-01-28 14:54:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:12,142 INFO L93 Difference]: Finished difference Result 656 states and 1964 transitions. [2022-01-28 14:54:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:54:12,143 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 [2022-01-28 14:54:12,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:12,144 INFO L225 Difference]: With dead ends: 656 [2022-01-28 14:54:12,144 INFO L226 Difference]: Without dead ends: 626 [2022-01-28 14:54:12,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:54:12,144 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:12,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 220 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 510 Invalid, 0 Unknown, 435 Unchecked, 0.2s Time] [2022-01-28 14:54:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-01-28 14:54:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 452. [2022-01-28 14:54:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.12860310421286) internal successors, (1411), 451 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1411 transitions. [2022-01-28 14:54:12,150 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1411 transitions. Word has length 20 [2022-01-28 14:54:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:12,150 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1411 transitions. [2022-01-28 14:54:12,150 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) [2022-01-28 14:54:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1411 transitions. [2022-01-28 14:54:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:12,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:12,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:12,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-28 14:54:12,350 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 [2022-01-28 14:54:12,351 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1412276849, now seen corresponding path program 233 times [2022-01-28 14:54:12,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:12,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287034684] [2022-01-28 14:54:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:12,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:12,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287034684] [2022-01-28 14:54:12,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287034684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:12,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781940457] [2022-01-28 14:54:12,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:12,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:12,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:12,460 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) [2022-01-28 14:54:12,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-28 14:54:12,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:12,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:12,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:12,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:12,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:12,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:12,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:12,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:12,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:12,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:12,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:12,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:12,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:12,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781940457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:12,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:12,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:54:12,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931865947] [2022-01-28 14:54:12,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:12,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:54:12,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:54:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:54:12,929 INFO L87 Difference]: Start difference. First operand 452 states and 1411 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) [2022-01-28 14:54:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:13,204 INFO L93 Difference]: Finished difference Result 600 states and 1835 transitions. [2022-01-28 14:54:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:54:13,204 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 [2022-01-28 14:54:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:13,205 INFO L225 Difference]: With dead ends: 600 [2022-01-28 14:54:13,205 INFO L226 Difference]: Without dead ends: 585 [2022-01-28 14:54:13,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:13,205 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:13,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 177 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 507 Invalid, 0 Unknown, 180 Unchecked, 0.2s Time] [2022-01-28 14:54:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-28 14:54:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 454. [2022-01-28 14:54:13,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1258278145695364) internal successors, (1416), 453 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1416 transitions. [2022-01-28 14:54:13,211 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1416 transitions. Word has length 20 [2022-01-28 14:54:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:13,211 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1416 transitions. [2022-01-28 14:54:13,211 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) [2022-01-28 14:54:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1416 transitions. [2022-01-28 14:54:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:13,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:13,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:13,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-01-28 14:54:13,411 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 [2022-01-28 14:54:13,412 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:13,412 INFO L85 PathProgramCache]: Analyzing trace with hash -423216301, now seen corresponding path program 234 times [2022-01-28 14:54:13,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:13,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135831870] [2022-01-28 14:54:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:13,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:13,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:13,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135831870] [2022-01-28 14:54:13,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135831870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:13,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82177838] [2022-01-28 14:54:13,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:13,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:13,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:13,522 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) [2022-01-28 14:54:13,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-28 14:54:13,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:54:13,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:13,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:13,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:13,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:13,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:13,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:13,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:13,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:13,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:13,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:13,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:13,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:13,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:13,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:13,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:13,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82177838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:13,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:13,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:54:13,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225158696] [2022-01-28 14:54:13,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:13,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:54:13,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:13,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:54:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:54:13,962 INFO L87 Difference]: Start difference. First operand 454 states and 1416 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) [2022-01-28 14:54:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:14,159 INFO L93 Difference]: Finished difference Result 594 states and 1820 transitions. [2022-01-28 14:54:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:54:14,159 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 [2022-01-28 14:54:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:14,160 INFO L225 Difference]: With dead ends: 594 [2022-01-28 14:54:14,160 INFO L226 Difference]: Without dead ends: 579 [2022-01-28 14:54:14,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:14,160 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:14,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 137 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 309 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-01-28 14:54:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-28 14:54:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 454. [2022-01-28 14:54:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1258278145695364) internal successors, (1416), 453 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1416 transitions. [2022-01-28 14:54:14,166 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1416 transitions. Word has length 20 [2022-01-28 14:54:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:14,166 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1416 transitions. [2022-01-28 14:54:14,166 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) [2022-01-28 14:54:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1416 transitions. [2022-01-28 14:54:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:14,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:14,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:14,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-01-28 14:54:14,367 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 [2022-01-28 14:54:14,367 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -577653819, now seen corresponding path program 235 times [2022-01-28 14:54:14,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:14,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63205830] [2022-01-28 14:54:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:14,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:14,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:14,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63205830] [2022-01-28 14:54:14,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63205830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:14,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523213561] [2022-01-28 14:54:14,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:14,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:14,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:14,482 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) [2022-01-28 14:54:14,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-28 14:54:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:14,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:14,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:14,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:14,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:14,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:14,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:14,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:14,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:14,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:14,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:14,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:14,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:14,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523213561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:14,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:14,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:54:14,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523040437] [2022-01-28 14:54:14,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:14,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:54:14,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:54:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:54:14,969 INFO L87 Difference]: Start difference. First operand 454 states and 1416 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) [2022-01-28 14:54:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:15,195 INFO L93 Difference]: Finished difference Result 565 states and 1734 transitions. [2022-01-28 14:54:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:54:15,195 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 [2022-01-28 14:54:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:15,196 INFO L225 Difference]: With dead ends: 565 [2022-01-28 14:54:15,196 INFO L226 Difference]: Without dead ends: 550 [2022-01-28 14:54:15,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:15,196 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:15,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 156 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 501 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-01-28 14:54:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-01-28 14:54:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 456. [2022-01-28 14:54:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1274725274725275) internal successors, (1423), 455 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1423 transitions. [2022-01-28 14:54:15,202 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1423 transitions. Word has length 20 [2022-01-28 14:54:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:15,202 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1423 transitions. [2022-01-28 14:54:15,202 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) [2022-01-28 14:54:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1423 transitions. [2022-01-28 14:54:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:15,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:15,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:15,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-01-28 14:54:15,403 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 [2022-01-28 14:54:15,403 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1458092879, now seen corresponding path program 236 times [2022-01-28 14:54:15,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:15,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021210774] [2022-01-28 14:54:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:15,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:15,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021210774] [2022-01-28 14:54:15,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021210774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470159599] [2022-01-28 14:54:15,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:15,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:15,525 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) [2022-01-28 14:54:15,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-28 14:54:15,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:15,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:15,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:15,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:15,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:15,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:15,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:15,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:15,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:15,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:15,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:16,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:16,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:16,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:16,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:16,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470159599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:16,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:16,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:16,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533031983] [2022-01-28 14:54:16,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:16,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:16,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:16,056 INFO L87 Difference]: Start difference. First operand 456 states and 1423 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) [2022-01-28 14:54:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:16,302 INFO L93 Difference]: Finished difference Result 625 states and 1896 transitions. [2022-01-28 14:54:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:54:16,302 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 [2022-01-28 14:54:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:16,304 INFO L225 Difference]: With dead ends: 625 [2022-01-28 14:54:16,304 INFO L226 Difference]: Without dead ends: 610 [2022-01-28 14:54:16,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:54:16,304 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:16,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 222 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 504 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-01-28 14:54:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-01-28 14:54:16,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 460. [2022-01-28 14:54:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.122004357298475) internal successors, (1433), 459 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1433 transitions. [2022-01-28 14:54:16,309 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1433 transitions. Word has length 20 [2022-01-28 14:54:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:16,309 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1433 transitions. [2022-01-28 14:54:16,309 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) [2022-01-28 14:54:16,309 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1433 transitions. [2022-01-28 14:54:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:16,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:16,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:16,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-01-28 14:54:16,510 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 [2022-01-28 14:54:16,510 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:16,511 INFO L85 PathProgramCache]: Analyzing trace with hash -82878929, now seen corresponding path program 237 times [2022-01-28 14:54:16,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:16,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121100504] [2022-01-28 14:54:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:16,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:16,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:16,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121100504] [2022-01-28 14:54:16,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121100504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:16,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302598178] [2022-01-28 14:54:16,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:16,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:16,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:16,645 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) [2022-01-28 14:54:16,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-28 14:54:16,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:54:16,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:16,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:16,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:16,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:16,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:16,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:16,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:16,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:16,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:17,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:17,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:17,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:17,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:17,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:17,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:17,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302598178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:17,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:17,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:17,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879314933] [2022-01-28 14:54:17,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:17,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:17,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:17,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:17,226 INFO L87 Difference]: Start difference. First operand 460 states and 1433 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) [2022-01-28 14:54:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:17,510 INFO L93 Difference]: Finished difference Result 624 states and 1889 transitions. [2022-01-28 14:54:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:54:17,511 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 [2022-01-28 14:54:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:17,512 INFO L225 Difference]: With dead ends: 624 [2022-01-28 14:54:17,512 INFO L226 Difference]: Without dead ends: 617 [2022-01-28 14:54:17,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:54:17,512 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:17,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 245 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 638 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-28 14:54:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-28 14:54:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 450. [2022-01-28 14:54:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.1269487750556793) internal successors, (1404), 449 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1404 transitions. [2022-01-28 14:54:17,519 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1404 transitions. Word has length 20 [2022-01-28 14:54:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:17,519 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1404 transitions. [2022-01-28 14:54:17,519 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) [2022-01-28 14:54:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1404 transitions. [2022-01-28 14:54:17,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:17,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:17,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:17,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-01-28 14:54:17,727 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 [2022-01-28 14:54:17,727 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:17,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1572818233, now seen corresponding path program 238 times [2022-01-28 14:54:17,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:17,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430053426] [2022-01-28 14:54:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:17,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:17,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:17,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430053426] [2022-01-28 14:54:17,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430053426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:17,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243403817] [2022-01-28 14:54:17,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:17,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:17,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:17,825 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) [2022-01-28 14:54:17,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-28 14:54:17,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:17,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:17,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:17,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:17,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:17,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:18,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:18,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:18,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:18,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:18,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:18,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:18,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243403817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:18,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:18,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:54:18,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542505337] [2022-01-28 14:54:18,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:18,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:54:18,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:18,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:54:18,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:54:18,222 INFO L87 Difference]: Start difference. First operand 450 states and 1404 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) [2022-01-28 14:54:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:18,629 INFO L93 Difference]: Finished difference Result 678 states and 2065 transitions. [2022-01-28 14:54:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:54:18,629 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 [2022-01-28 14:54:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:18,630 INFO L225 Difference]: With dead ends: 678 [2022-01-28 14:54:18,630 INFO L226 Difference]: Without dead ends: 648 [2022-01-28 14:54:18,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:54:18,631 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:18,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 197 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-28 14:54:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 461. [2022-01-28 14:54:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.123913043478261) internal successors, (1437), 460 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1437 transitions. [2022-01-28 14:54:18,636 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1437 transitions. Word has length 20 [2022-01-28 14:54:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:18,636 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1437 transitions. [2022-01-28 14:54:18,636 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) [2022-01-28 14:54:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1437 transitions. [2022-01-28 14:54:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:18,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:18,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:18,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-01-28 14:54:18,837 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 [2022-01-28 14:54:18,837 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:18,838 INFO L85 PathProgramCache]: Analyzing trace with hash -474536711, now seen corresponding path program 239 times [2022-01-28 14:54:18,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:18,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683422652] [2022-01-28 14:54:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:18,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:18,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:18,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683422652] [2022-01-28 14:54:18,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683422652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:18,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523642225] [2022-01-28 14:54:18,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:18,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:18,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:18,936 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) [2022-01-28 14:54:18,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-28 14:54:18,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:54:18,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:19,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:19,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:19,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:19,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:19,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:19,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:19,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:19,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:19,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523642225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:19,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:19,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:54:19,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072615258] [2022-01-28 14:54:19,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:19,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:19,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:19,539 INFO L87 Difference]: Start difference. First operand 461 states and 1437 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) [2022-01-28 14:54:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:20,104 INFO L93 Difference]: Finished difference Result 759 states and 2297 transitions. [2022-01-28 14:54:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:54:20,105 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 [2022-01-28 14:54:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:20,106 INFO L225 Difference]: With dead ends: 759 [2022-01-28 14:54:20,106 INFO L226 Difference]: Without dead ends: 729 [2022-01-28 14:54:20,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:54:20,106 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:20,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 200 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-01-28 14:54:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 461. [2022-01-28 14:54:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.123913043478261) internal successors, (1437), 460 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1437 transitions. [2022-01-28 14:54:20,112 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1437 transitions. Word has length 20 [2022-01-28 14:54:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:20,112 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1437 transitions. [2022-01-28 14:54:20,112 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) [2022-01-28 14:54:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1437 transitions. [2022-01-28 14:54:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:20,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:20,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:20,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-01-28 14:54:20,313 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 [2022-01-28 14:54:20,313 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash 240614959, now seen corresponding path program 240 times [2022-01-28 14:54:20,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:20,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860266797] [2022-01-28 14:54:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:20,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:20,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:20,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860266797] [2022-01-28 14:54:20,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860266797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:20,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547464604] [2022-01-28 14:54:20,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:20,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:20,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:20,435 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) [2022-01-28 14:54:20,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-28 14:54:20,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:54:20,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:20,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:20,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:20,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:20,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:20,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:20,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:20,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:20,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:20,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:20,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:20,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547464604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:20,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:20,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:54:20,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319755874] [2022-01-28 14:54:20,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:20,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:20,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:20,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:20,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:20,848 INFO L87 Difference]: Start difference. First operand 461 states and 1437 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) [2022-01-28 14:54:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:21,238 INFO L93 Difference]: Finished difference Result 696 states and 2102 transitions. [2022-01-28 14:54:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:54:21,239 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 [2022-01-28 14:54:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:21,240 INFO L225 Difference]: With dead ends: 696 [2022-01-28 14:54:21,240 INFO L226 Difference]: Without dead ends: 666 [2022-01-28 14:54:21,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:54:21,240 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:21,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 198 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-28 14:54:21,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 461. [2022-01-28 14:54:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.123913043478261) internal successors, (1437), 460 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1437 transitions. [2022-01-28 14:54:21,248 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1437 transitions. Word has length 20 [2022-01-28 14:54:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:21,248 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1437 transitions. [2022-01-28 14:54:21,248 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) [2022-01-28 14:54:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1437 transitions. [2022-01-28 14:54:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:21,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:21,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:21,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-28 14:54:21,459 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 [2022-01-28 14:54:21,459 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash 317390009, now seen corresponding path program 241 times [2022-01-28 14:54:21,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087315216] [2022-01-28 14:54:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:21,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:21,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:21,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087315216] [2022-01-28 14:54:21,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087315216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:21,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461073784] [2022-01-28 14:54:21,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:21,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:21,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:21,577 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) [2022-01-28 14:54:21,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-28 14:54:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:21,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:21,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:21,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:21,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:21,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:21,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:21,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:21,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:21,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:21,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:21,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461073784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:21,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:21,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:54:21,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717489691] [2022-01-28 14:54:21,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:21,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:54:21,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:54:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:54:21,920 INFO L87 Difference]: Start difference. First operand 461 states and 1437 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) [2022-01-28 14:54:22,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:22,452 INFO L93 Difference]: Finished difference Result 889 states and 2641 transitions. [2022-01-28 14:54:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:54:22,452 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 [2022-01-28 14:54:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:22,454 INFO L225 Difference]: With dead ends: 889 [2022-01-28 14:54:22,454 INFO L226 Difference]: Without dead ends: 859 [2022-01-28 14:54:22,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:54:22,454 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:22,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 238 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-28 14:54:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 461. [2022-01-28 14:54:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 3.123913043478261) internal successors, (1437), 460 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1437 transitions. [2022-01-28 14:54:22,460 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1437 transitions. Word has length 20 [2022-01-28 14:54:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:22,460 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 1437 transitions. [2022-01-28 14:54:22,460 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) [2022-01-28 14:54:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1437 transitions. [2022-01-28 14:54:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:22,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:22,461 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:22,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-01-28 14:54:22,661 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 [2022-01-28 14:54:22,661 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:22,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:22,662 INFO L85 PathProgramCache]: Analyzing trace with hash -82598311, now seen corresponding path program 242 times [2022-01-28 14:54:22,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:22,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111459919] [2022-01-28 14:54:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:22,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:22,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111459919] [2022-01-28 14:54:22,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111459919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862781415] [2022-01-28 14:54:22,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:22,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:22,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:22,783 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) [2022-01-28 14:54:22,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-28 14:54:22,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:22,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:22,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:22,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:22,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:22,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:22,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:23,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:23,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:23,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:23,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:23,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:23,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:23,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862781415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:23,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:23,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:54:23,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584371061] [2022-01-28 14:54:23,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:23,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:23,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:23,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:23,189 INFO L87 Difference]: Start difference. First operand 461 states and 1437 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) [2022-01-28 14:54:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:23,748 INFO L93 Difference]: Finished difference Result 697 states and 2117 transitions. [2022-01-28 14:54:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:54:23,749 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 [2022-01-28 14:54:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:23,750 INFO L225 Difference]: With dead ends: 697 [2022-01-28 14:54:23,750 INFO L226 Difference]: Without dead ends: 682 [2022-01-28 14:54:23,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:54:23,750 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:23,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 271 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:54:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-28 14:54:23,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 471. [2022-01-28 14:54:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.125531914893617) internal successors, (1469), 470 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1469 transitions. [2022-01-28 14:54:23,756 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1469 transitions. Word has length 20 [2022-01-28 14:54:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:23,756 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1469 transitions. [2022-01-28 14:54:23,756 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) [2022-01-28 14:54:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1469 transitions. [2022-01-28 14:54:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:23,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:23,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:23,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-28 14:54:23,957 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 [2022-01-28 14:54:23,957 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:23,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash 513507605, now seen corresponding path program 243 times [2022-01-28 14:54:23,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:23,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53534416] [2022-01-28 14:54:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:23,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:24,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53534416] [2022-01-28 14:54:24,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53534416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097316000] [2022-01-28 14:54:24,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:24,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:24,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:24,082 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) [2022-01-28 14:54:24,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-28 14:54:24,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:54:24,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:24,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:24,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:24,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:24,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:24,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:24,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:24,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:24,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:24,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:24,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:24,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:24,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097316000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:24,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:24,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:54:24,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269861366] [2022-01-28 14:54:24,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:24,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:24,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:24,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:24,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:24,497 INFO L87 Difference]: Start difference. First operand 471 states and 1469 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) [2022-01-28 14:54:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:24,997 INFO L93 Difference]: Finished difference Result 709 states and 2147 transitions. [2022-01-28 14:54:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:54:24,997 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 [2022-01-28 14:54:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:24,998 INFO L225 Difference]: With dead ends: 709 [2022-01-28 14:54:24,999 INFO L226 Difference]: Without dead ends: 694 [2022-01-28 14:54:24,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:54:24,999 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 79 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:24,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 204 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-28 14:54:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 470. [2022-01-28 14:54:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.121535181236674) internal successors, (1464), 469 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1464 transitions. [2022-01-28 14:54:25,005 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1464 transitions. Word has length 20 [2022-01-28 14:54:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:25,005 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1464 transitions. [2022-01-28 14:54:25,005 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) [2022-01-28 14:54:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1464 transitions. [2022-01-28 14:54:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:25,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:25,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:25,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:25,211 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 [2022-01-28 14:54:25,211 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash 20911843, now seen corresponding path program 244 times [2022-01-28 14:54:25,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:25,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823058357] [2022-01-28 14:54:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:25,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:25,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:25,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823058357] [2022-01-28 14:54:25,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823058357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:25,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208927059] [2022-01-28 14:54:25,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:25,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:25,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:25,337 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) [2022-01-28 14:54:25,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-28 14:54:25,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:25,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:25,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:25,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:25,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:25,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:25,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:25,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:25,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:25,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:25,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:25,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:25,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208927059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:25,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:25,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2022-01-28 14:54:25,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399305927] [2022-01-28 14:54:25,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:25,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:25,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:25,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:25,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:25,747 INFO L87 Difference]: Start difference. First operand 470 states and 1464 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) [2022-01-28 14:54:26,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:26,113 INFO L93 Difference]: Finished difference Result 655 states and 1992 transitions. [2022-01-28 14:54:26,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:54:26,114 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 [2022-01-28 14:54:26,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:26,116 INFO L225 Difference]: With dead ends: 655 [2022-01-28 14:54:26,116 INFO L226 Difference]: Without dead ends: 640 [2022-01-28 14:54:26,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:54:26,116 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:26,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 186 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-28 14:54:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 467. [2022-01-28 14:54:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.1223175965665235) internal successors, (1455), 466 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1455 transitions. [2022-01-28 14:54:26,123 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1455 transitions. Word has length 20 [2022-01-28 14:54:26,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:26,123 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1455 transitions. [2022-01-28 14:54:26,123 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) [2022-01-28 14:54:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1455 transitions. [2022-01-28 14:54:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:26,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:26,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:26,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-01-28 14:54:26,327 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 [2022-01-28 14:54:26,327 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1506001169, now seen corresponding path program 245 times [2022-01-28 14:54:26,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:26,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360744429] [2022-01-28 14:54:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:26,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:26,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:26,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360744429] [2022-01-28 14:54:26,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360744429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:26,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075036727] [2022-01-28 14:54:26,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:26,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:26,446 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) [2022-01-28 14:54:26,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-28 14:54:26,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:54:26,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:26,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:54:26,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:26,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:26,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:26,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:26,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:26,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:26,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:26,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:26,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:26,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:26,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075036727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:26,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:26,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:54:26,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856172163] [2022-01-28 14:54:26,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:26,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:54:26,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:54:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:54:26,960 INFO L87 Difference]: Start difference. First operand 467 states and 1455 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) [2022-01-28 14:54:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:27,742 INFO L93 Difference]: Finished difference Result 837 states and 2516 transitions. [2022-01-28 14:54:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:54:27,742 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 [2022-01-28 14:54:27,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:27,744 INFO L225 Difference]: With dead ends: 837 [2022-01-28 14:54:27,744 INFO L226 Difference]: Without dead ends: 792 [2022-01-28 14:54:27,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:54:27,744 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 98 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:27,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 280 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:54:27,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-28 14:54:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 489. [2022-01-28 14:54:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.1147540983606556) internal successors, (1520), 488 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1520 transitions. [2022-01-28 14:54:27,751 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1520 transitions. Word has length 20 [2022-01-28 14:54:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:27,751 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1520 transitions. [2022-01-28 14:54:27,751 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) [2022-01-28 14:54:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1520 transitions. [2022-01-28 14:54:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:27,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:27,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:27,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-01-28 14:54:27,952 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 [2022-01-28 14:54:27,952 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:27,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:27,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1996347205, now seen corresponding path program 246 times [2022-01-28 14:54:27,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:27,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444195790] [2022-01-28 14:54:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:27,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:28,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:28,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444195790] [2022-01-28 14:54:28,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444195790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:28,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904166801] [2022-01-28 14:54:28,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:28,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:28,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:28,059 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) [2022-01-28 14:54:28,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-28 14:54:28,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:54:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:28,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:28,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:28,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:28,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:28,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:28,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:28,418 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:54:28,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:54:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:28,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904166801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:28,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:28,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:28,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124835442] [2022-01-28 14:54:28,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:28,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:28,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:28,423 INFO L87 Difference]: Start difference. First operand 489 states and 1520 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) [2022-01-28 14:54:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:29,052 INFO L93 Difference]: Finished difference Result 935 states and 2815 transitions. [2022-01-28 14:54:29,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:54:29,052 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 [2022-01-28 14:54:29,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:29,053 INFO L225 Difference]: With dead ends: 935 [2022-01-28 14:54:29,054 INFO L226 Difference]: Without dead ends: 920 [2022-01-28 14:54:29,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:54:29,054 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 214 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:29,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 195 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-01-28 14:54:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 498. [2022-01-28 14:54:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.112676056338028) internal successors, (1547), 497 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1547 transitions. [2022-01-28 14:54:29,061 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1547 transitions. Word has length 20 [2022-01-28 14:54:29,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:29,061 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1547 transitions. [2022-01-28 14:54:29,061 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) [2022-01-28 14:54:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1547 transitions. [2022-01-28 14:54:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:29,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:29,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:29,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-28 14:54:29,262 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 [2022-01-28 14:54:29,262 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:29,262 INFO L85 PathProgramCache]: Analyzing trace with hash -381198051, now seen corresponding path program 247 times [2022-01-28 14:54:29,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:29,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134175033] [2022-01-28 14:54:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:29,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:29,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:29,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134175033] [2022-01-28 14:54:29,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134175033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:29,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602104761] [2022-01-28 14:54:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:29,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:29,376 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) [2022-01-28 14:54:29,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-28 14:54:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:29,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:29,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:29,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:29,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:29,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:29,763 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:54:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:54:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:29,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602104761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:29,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:29,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:29,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664845562] [2022-01-28 14:54:29,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:29,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:29,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:29,770 INFO L87 Difference]: Start difference. First operand 498 states and 1547 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) [2022-01-28 14:54:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:30,250 INFO L93 Difference]: Finished difference Result 870 states and 2611 transitions. [2022-01-28 14:54:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:54:30,250 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 [2022-01-28 14:54:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:30,251 INFO L225 Difference]: With dead ends: 870 [2022-01-28 14:54:30,251 INFO L226 Difference]: Without dead ends: 855 [2022-01-28 14:54:30,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:54:30,252 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:30,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 206 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-01-28 14:54:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 502. [2022-01-28 14:54:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1157684630738522) internal successors, (1561), 501 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1561 transitions. [2022-01-28 14:54:30,258 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1561 transitions. Word has length 20 [2022-01-28 14:54:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:30,258 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1561 transitions. [2022-01-28 14:54:30,258 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) [2022-01-28 14:54:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1561 transitions. [2022-01-28 14:54:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:30,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:30,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:30,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-01-28 14:54:30,459 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 [2022-01-28 14:54:30,459 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:30,460 INFO L85 PathProgramCache]: Analyzing trace with hash 214907865, now seen corresponding path program 248 times [2022-01-28 14:54:30,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:30,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018553164] [2022-01-28 14:54:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:30,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:30,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:30,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018553164] [2022-01-28 14:54:30,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018553164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:30,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392459432] [2022-01-28 14:54:30,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:30,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:30,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:30,579 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) [2022-01-28 14:54:30,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-28 14:54:30,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:30,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:30,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:30,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:30,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:30,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:30,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:30,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:30,970 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:54:30,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:54:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:30,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392459432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:30,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:30,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:30,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35174750] [2022-01-28 14:54:30,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:30,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:30,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:30,977 INFO L87 Difference]: Start difference. First operand 502 states and 1561 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) [2022-01-28 14:54:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:31,500 INFO L93 Difference]: Finished difference Result 882 states and 2641 transitions. [2022-01-28 14:54:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:54:31,500 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 [2022-01-28 14:54:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:31,501 INFO L225 Difference]: With dead ends: 882 [2022-01-28 14:54:31,501 INFO L226 Difference]: Without dead ends: 867 [2022-01-28 14:54:31,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:54:31,502 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 111 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:31,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 227 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-28 14:54:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 501. [2022-01-28 14:54:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.112) internal successors, (1556), 500 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1556 transitions. [2022-01-28 14:54:31,508 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1556 transitions. Word has length 20 [2022-01-28 14:54:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:31,508 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1556 transitions. [2022-01-28 14:54:31,508 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) [2022-01-28 14:54:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1556 transitions. [2022-01-28 14:54:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:31,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:31,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:31,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-01-28 14:54:31,709 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 [2022-01-28 14:54:31,709 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash -277687897, now seen corresponding path program 249 times [2022-01-28 14:54:31,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:31,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546563303] [2022-01-28 14:54:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:31,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:31,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:31,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546563303] [2022-01-28 14:54:31,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546563303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:31,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138025432] [2022-01-28 14:54:31,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:31,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:31,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:31,825 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) [2022-01-28 14:54:31,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-28 14:54:31,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:54:31,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:31,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:31,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:32,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:32,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:32,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:32,271 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:54:32,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:54:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:32,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138025432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:32,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:32,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:32,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878182035] [2022-01-28 14:54:32,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:32,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:32,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:32,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:32,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:32,277 INFO L87 Difference]: Start difference. First operand 501 states and 1556 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) [2022-01-28 14:54:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:32,634 INFO L93 Difference]: Finished difference Result 832 states and 2498 transitions. [2022-01-28 14:54:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:54:32,634 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 [2022-01-28 14:54:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:32,635 INFO L225 Difference]: With dead ends: 832 [2022-01-28 14:54:32,636 INFO L226 Difference]: Without dead ends: 817 [2022-01-28 14:54:32,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:54:32,636 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 103 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:32,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 165 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:54:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-28 14:54:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 495. [2022-01-28 14:54:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.11336032388664) internal successors, (1538), 494 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) [2022-01-28 14:54:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1538 transitions. [2022-01-28 14:54:32,642 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1538 transitions. Word has length 20 [2022-01-28 14:54:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:32,642 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1538 transitions. [2022-01-28 14:54:32,642 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) [2022-01-28 14:54:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1538 transitions. [2022-01-28 14:54:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:32,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:32,643 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] [2022-01-28 14:54:32,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-01-28 14:54:32,843 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 [2022-01-28 14:54:32,843 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash 693787661, now seen corresponding path program 250 times [2022-01-28 14:54:32,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:32,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576413039] [2022-01-28 14:54:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:32,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:32,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:32,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576413039] [2022-01-28 14:54:32,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576413039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:32,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200988029] [2022-01-28 14:54:32,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:32,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:32,960 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) [2022-01-28 14:54:32,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-28 14:54:32,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:32,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:33,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:33,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:33,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:33,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:33,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:33,355 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:54:33,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:54:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:33,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200988029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:33,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:33,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:33,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666070048] [2022-01-28 14:54:33,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:33,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:33,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:33,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:33,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:33,361 INFO L87 Difference]: Start difference. First operand 495 states and 1538 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) [2022-01-28 14:54:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:33,839 INFO L93 Difference]: Finished difference Result 888 states and 2665 transitions. [2022-01-28 14:54:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:54:33,840 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 [2022-01-28 14:54:33,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:33,841 INFO L225 Difference]: With dead ends: 888 [2022-01-28 14:54:33,841 INFO L226 Difference]: Without dead ends: 873 [2022-01-28 14:54:33,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:54:33,841 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 86 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:33,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 197 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-01-28 14:54:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 505. [2022-01-28 14:54:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.115079365079365) internal successors, (1570), 504 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1570 transitions. [2022-01-28 14:54:33,848 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1570 transitions. Word has length 20 [2022-01-28 14:54:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:33,848 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1570 transitions. [2022-01-28 14:54:33,848 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) [2022-01-28 14:54:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1570 transitions. [2022-01-28 14:54:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:33,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:33,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:33,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:34,049 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 [2022-01-28 14:54:34,049 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1289893577, now seen corresponding path program 251 times [2022-01-28 14:54:34,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:34,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95826799] [2022-01-28 14:54:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:34,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:34,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:34,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95826799] [2022-01-28 14:54:34,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95826799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:34,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298678518] [2022-01-28 14:54:34,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:34,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:34,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:34,168 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) [2022-01-28 14:54:34,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-28 14:54:34,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:54:34,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:34,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:54:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:34,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:34,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:34,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:34,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:34,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:34,748 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:54:34,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:34,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298678518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:34,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:34,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:34,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613513453] [2022-01-28 14:54:34,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:34,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:34,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:34,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:34,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:34,755 INFO L87 Difference]: Start difference. First operand 505 states and 1570 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) [2022-01-28 14:54:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:35,622 INFO L93 Difference]: Finished difference Result 991 states and 2954 transitions. [2022-01-28 14:54:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:54:35,622 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 [2022-01-28 14:54:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:35,623 INFO L225 Difference]: With dead ends: 991 [2022-01-28 14:54:35,623 INFO L226 Difference]: Without dead ends: 961 [2022-01-28 14:54:35,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 14:54:35,624 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:35,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 301 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:54:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-01-28 14:54:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 508. [2022-01-28 14:54:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.1203155818540433) internal successors, (1582), 507 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1582 transitions. [2022-01-28 14:54:35,631 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1582 transitions. Word has length 20 [2022-01-28 14:54:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:35,631 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1582 transitions. [2022-01-28 14:54:35,631 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) [2022-01-28 14:54:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1582 transitions. [2022-01-28 14:54:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:35,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:35,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:35,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:35,832 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 [2022-01-28 14:54:35,832 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash 797297815, now seen corresponding path program 252 times [2022-01-28 14:54:35,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:35,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939841166] [2022-01-28 14:54:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:35,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:35,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939841166] [2022-01-28 14:54:35,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939841166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339330317] [2022-01-28 14:54:35,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:35,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:35,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:35,945 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) [2022-01-28 14:54:35,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-28 14:54:35,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:54:35,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:35,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:35,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:36,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:36,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:36,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:36,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:36,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:36,325 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:54:36,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:54:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:36,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339330317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:36,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:36,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:36,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072113794] [2022-01-28 14:54:36,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:36,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:36,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:36,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:36,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:36,332 INFO L87 Difference]: Start difference. First operand 508 states and 1582 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) [2022-01-28 14:54:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:36,757 INFO L93 Difference]: Finished difference Result 830 states and 2500 transitions. [2022-01-28 14:54:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:54:36,757 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 [2022-01-28 14:54:36,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:36,758 INFO L225 Difference]: With dead ends: 830 [2022-01-28 14:54:36,758 INFO L226 Difference]: Without dead ends: 815 [2022-01-28 14:54:36,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:54:36,759 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 89 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:36,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 187 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:36,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-01-28 14:54:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 508. [2022-01-28 14:54:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.1203155818540433) internal successors, (1582), 507 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1582 transitions. [2022-01-28 14:54:36,765 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1582 transitions. Word has length 20 [2022-01-28 14:54:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:36,765 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1582 transitions. [2022-01-28 14:54:36,765 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) [2022-01-28 14:54:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1582 transitions. [2022-01-28 14:54:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:36,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:36,766 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] [2022-01-28 14:54:36,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-01-28 14:54:36,966 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 [2022-01-28 14:54:36,966 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:36,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:36,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2012580155, now seen corresponding path program 253 times [2022-01-28 14:54:36,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:36,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777893603] [2022-01-28 14:54:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:36,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:37,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:37,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777893603] [2022-01-28 14:54:37,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777893603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:37,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244846060] [2022-01-28 14:54:37,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:37,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:37,063 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) [2022-01-28 14:54:37,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-28 14:54:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:37,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:37,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:37,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:37,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:37,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:37,379 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:54:37,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:54:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:37,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244846060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:37,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:37,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-28 14:54:37,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135080804] [2022-01-28 14:54:37,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:37,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:54:37,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:37,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:54:37,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:54:37,385 INFO L87 Difference]: Start difference. First operand 508 states and 1582 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) [2022-01-28 14:54:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:37,805 INFO L93 Difference]: Finished difference Result 874 states and 2654 transitions. [2022-01-28 14:54:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:54:37,806 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 [2022-01-28 14:54:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:37,807 INFO L225 Difference]: With dead ends: 874 [2022-01-28 14:54:37,807 INFO L226 Difference]: Without dead ends: 859 [2022-01-28 14:54:37,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:54:37,807 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 89 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:37,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 228 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:54:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-28 14:54:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 508. [2022-01-28 14:54:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.1203155818540433) internal successors, (1582), 507 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1582 transitions. [2022-01-28 14:54:37,814 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1582 transitions. Word has length 20 [2022-01-28 14:54:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:37,814 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1582 transitions. [2022-01-28 14:54:37,814 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) [2022-01-28 14:54:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1582 transitions. [2022-01-28 14:54:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:37,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:37,815 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] [2022-01-28 14:54:37,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-01-28 14:54:38,015 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 [2022-01-28 14:54:38,015 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:38,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1723954981, now seen corresponding path program 254 times [2022-01-28 14:54:38,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:38,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077835540] [2022-01-28 14:54:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:38,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:38,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077835540] [2022-01-28 14:54:38,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077835540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589026114] [2022-01-28 14:54:38,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:38,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:38,154 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) [2022-01-28 14:54:38,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-28 14:54:38,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:38,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:38,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:38,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:38,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:38,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:38,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:38,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:38,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:38,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:38,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:38,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:38,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589026114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:38,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:38,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:38,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332799750] [2022-01-28 14:54:38,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:38,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:38,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:38,658 INFO L87 Difference]: Start difference. First operand 508 states and 1582 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) [2022-01-28 14:54:38,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:38,978 INFO L93 Difference]: Finished difference Result 786 states and 2370 transitions. [2022-01-28 14:54:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:54:38,979 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 [2022-01-28 14:54:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:38,980 INFO L225 Difference]: With dead ends: 786 [2022-01-28 14:54:38,980 INFO L226 Difference]: Without dead ends: 779 [2022-01-28 14:54:38,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:54:38,980 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:38,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 175 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 555 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2022-01-28 14:54:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-28 14:54:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 496. [2022-01-28 14:54:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.113131313131313) internal successors, (1541), 495 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) [2022-01-28 14:54:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1541 transitions. [2022-01-28 14:54:38,989 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1541 transitions. Word has length 20 [2022-01-28 14:54:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:38,990 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1541 transitions. [2022-01-28 14:54:38,990 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) [2022-01-28 14:54:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1541 transitions. [2022-01-28 14:54:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:38,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:38,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:39,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-01-28 14:54:39,206 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 [2022-01-28 14:54:39,206 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1222530017, now seen corresponding path program 255 times [2022-01-28 14:54:39,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:39,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232387111] [2022-01-28 14:54:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:39,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:39,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:39,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232387111] [2022-01-28 14:54:39,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232387111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:39,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188802460] [2022-01-28 14:54:39,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:39,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:39,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:39,339 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) [2022-01-28 14:54:39,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-28 14:54:39,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:54:39,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:39,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:39,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:39,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:39,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:39,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:39,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:39,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:39,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:39,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:39,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:39,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:39,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:39,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:39,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:39,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:39,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188802460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:39,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:39,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:54:39,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550273052] [2022-01-28 14:54:39,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:39,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:54:39,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:54:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:54:39,822 INFO L87 Difference]: Start difference. First operand 496 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) [2022-01-28 14:54:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:40,069 INFO L93 Difference]: Finished difference Result 689 states and 2103 transitions. [2022-01-28 14:54:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:54:40,070 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 [2022-01-28 14:54:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:40,071 INFO L225 Difference]: With dead ends: 689 [2022-01-28 14:54:40,071 INFO L226 Difference]: Without dead ends: 674 [2022-01-28 14:54:40,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:40,071 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:40,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 132 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 475 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-28 14:54:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-01-28 14:54:40,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 495. [2022-01-28 14:54:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.1093117408906883) internal successors, (1536), 494 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1536 transitions. [2022-01-28 14:54:40,077 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1536 transitions. Word has length 20 [2022-01-28 14:54:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:40,077 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1536 transitions. [2022-01-28 14:54:40,077 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) [2022-01-28 14:54:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1536 transitions. [2022-01-28 14:54:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:40,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:40,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:40,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-01-28 14:54:40,278 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 [2022-01-28 14:54:40,278 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -208489073, now seen corresponding path program 256 times [2022-01-28 14:54:40,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:40,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829976618] [2022-01-28 14:54:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:40,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:40,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:40,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829976618] [2022-01-28 14:54:40,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829976618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:40,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433804570] [2022-01-28 14:54:40,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:40,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:40,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:40,385 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) [2022-01-28 14:54:40,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-28 14:54:40,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:40,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:40,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:40,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:40,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:40,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:40,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:40,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:40,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:40,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:40,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:40,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:40,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:40,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:40,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:40,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:40,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:40,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433804570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:40,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:40,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:54:40,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816102284] [2022-01-28 14:54:40,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:40,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:54:40,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:40,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:54:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:54:40,890 INFO L87 Difference]: Start difference. First operand 495 states and 1536 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) [2022-01-28 14:54:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:41,084 INFO L93 Difference]: Finished difference Result 721 states and 2211 transitions. [2022-01-28 14:54:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:54:41,085 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 [2022-01-28 14:54:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:41,086 INFO L225 Difference]: With dead ends: 721 [2022-01-28 14:54:41,086 INFO L226 Difference]: Without dead ends: 714 [2022-01-28 14:54:41,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:41,086 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:41,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 121 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 387 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-28 14:54:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-28 14:54:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 488. [2022-01-28 14:54:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.11088295687885) internal successors, (1515), 487 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) [2022-01-28 14:54:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1515 transitions. [2022-01-28 14:54:41,097 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1515 transitions. Word has length 20 [2022-01-28 14:54:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:41,097 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1515 transitions. [2022-01-28 14:54:41,097 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) [2022-01-28 14:54:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1515 transitions. [2022-01-28 14:54:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:41,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:41,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:41,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2022-01-28 14:54:41,299 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 [2022-01-28 14:54:41,299 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1435193517, now seen corresponding path program 257 times [2022-01-28 14:54:41,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:41,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522930254] [2022-01-28 14:54:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:41,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:41,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:41,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522930254] [2022-01-28 14:54:41,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522930254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:41,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970617988] [2022-01-28 14:54:41,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:41,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:41,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:41,432 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) [2022-01-28 14:54:41,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-28 14:54:41,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:41,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:41,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:41,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:41,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:41,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:41,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:41,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:41,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:41,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:41,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:41,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:41,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:41,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:41,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:41,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:41,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:41,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970617988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:41,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:41,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:41,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60761804] [2022-01-28 14:54:41,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:41,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:41,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:41,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:41,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:41,927 INFO L87 Difference]: Start difference. First operand 488 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) [2022-01-28 14:54:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:42,263 INFO L93 Difference]: Finished difference Result 776 states and 2313 transitions. [2022-01-28 14:54:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:54:42,264 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 [2022-01-28 14:54:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:42,265 INFO L225 Difference]: With dead ends: 776 [2022-01-28 14:54:42,265 INFO L226 Difference]: Without dead ends: 761 [2022-01-28 14:54:42,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:54:42,265 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:42,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 263 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 627 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-01-28 14:54:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-28 14:54:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 484. [2022-01-28 14:54:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1055900621118013) internal successors, (1500), 483 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1500 transitions. [2022-01-28 14:54:42,271 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1500 transitions. Word has length 20 [2022-01-28 14:54:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:42,271 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1500 transitions. [2022-01-28 14:54:42,271 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) [2022-01-28 14:54:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1500 transitions. [2022-01-28 14:54:42,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:42,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:42,272 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] [2022-01-28 14:54:42,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-01-28 14:54:42,472 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 [2022-01-28 14:54:42,472 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:42,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:42,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1829510415, now seen corresponding path program 258 times [2022-01-28 14:54:42,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:42,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795419981] [2022-01-28 14:54:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:42,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:42,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:42,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795419981] [2022-01-28 14:54:42,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795419981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:42,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288672327] [2022-01-28 14:54:42,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:42,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:42,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:42,589 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) [2022-01-28 14:54:42,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-28 14:54:42,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:54:42,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:42,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:42,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:42,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:42,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:42,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:42,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:42,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:42,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:42,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:42,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:42,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:42,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:54:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:43,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288672327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:43,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:43,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:54:43,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935277967] [2022-01-28 14:54:43,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:43,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:54:43,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:54:43,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:54:43,071 INFO L87 Difference]: Start difference. First operand 484 states and 1500 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) [2022-01-28 14:54:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:43,425 INFO L93 Difference]: Finished difference Result 721 states and 2167 transitions. [2022-01-28 14:54:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:54:43,425 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 [2022-01-28 14:54:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:43,426 INFO L225 Difference]: With dead ends: 721 [2022-01-28 14:54:43,426 INFO L226 Difference]: Without dead ends: 706 [2022-01-28 14:54:43,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:54:43,426 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:43,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 153 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 468 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-01-28 14:54:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-28 14:54:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 482. [2022-01-28 14:54:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0997920997921) internal successors, (1491), 481 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1491 transitions. [2022-01-28 14:54:43,432 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1491 transitions. Word has length 20 [2022-01-28 14:54:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:43,432 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1491 transitions. [2022-01-28 14:54:43,432 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) [2022-01-28 14:54:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1491 transitions. [2022-01-28 14:54:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:43,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:43,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:43,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-01-28 14:54:43,633 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 [2022-01-28 14:54:43,633 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:43,634 INFO L85 PathProgramCache]: Analyzing trace with hash -980887943, now seen corresponding path program 259 times [2022-01-28 14:54:43,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:43,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128347354] [2022-01-28 14:54:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:43,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:43,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:43,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128347354] [2022-01-28 14:54:43,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128347354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:43,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338540394] [2022-01-28 14:54:43,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:43,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:43,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:43,768 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) [2022-01-28 14:54:43,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-28 14:54:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:43,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:43,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:43,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:43,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:43,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:43,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:43,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:44,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:44,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:44,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:44,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:44,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:44,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:44,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:44,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338540394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:44,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:44,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:44,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143685145] [2022-01-28 14:54:44,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:44,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:44,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:44,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:44,274 INFO L87 Difference]: Start difference. First operand 482 states and 1491 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) [2022-01-28 14:54:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:44,597 INFO L93 Difference]: Finished difference Result 774 states and 2305 transitions. [2022-01-28 14:54:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:54:44,597 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 [2022-01-28 14:54:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:44,598 INFO L225 Difference]: With dead ends: 774 [2022-01-28 14:54:44,598 INFO L226 Difference]: Without dead ends: 759 [2022-01-28 14:54:44,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:54:44,598 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:44,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 188 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 524 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-01-28 14:54:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-28 14:54:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 480. [2022-01-28 14:54:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.0981210855949897) internal successors, (1484), 479 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1484 transitions. [2022-01-28 14:54:44,605 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1484 transitions. Word has length 20 [2022-01-28 14:54:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:44,605 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1484 transitions. [2022-01-28 14:54:44,605 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) [2022-01-28 14:54:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1484 transitions. [2022-01-28 14:54:44,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:54:44,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:44,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:44,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-01-28 14:54:44,805 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 [2022-01-28 14:54:44,806 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1906663417, now seen corresponding path program 260 times [2022-01-28 14:54:44,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:44,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721994194] [2022-01-28 14:54:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:44,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:44,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721994194] [2022-01-28 14:54:44,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721994194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:44,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276950431] [2022-01-28 14:54:44,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:44,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:44,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:44,949 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) [2022-01-28 14:54:44,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-28 14:54:44,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:44,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:44,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:54:44,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:45,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:45,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:45,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:45,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:45,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:45,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:45,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:45,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:45,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:45,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:54:45,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:45,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:54:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:45,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276950431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:45,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:45,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 23 [2022-01-28 14:54:45,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745594517] [2022-01-28 14:54:45,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:45,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:45,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:45,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:45,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:45,458 INFO L87 Difference]: Start difference. First operand 480 states and 1484 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) [2022-01-28 14:54:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:45,795 INFO L93 Difference]: Finished difference Result 762 states and 2275 transitions. [2022-01-28 14:54:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:54:45,796 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 [2022-01-28 14:54:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:45,797 INFO L225 Difference]: With dead ends: 762 [2022-01-28 14:54:45,797 INFO L226 Difference]: Without dead ends: 747 [2022-01-28 14:54:45,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:54:45,797 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:45,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 199 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 554 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-01-28 14:54:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-01-28 14:54:45,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 471. [2022-01-28 14:54:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0914893617021275) internal successors, (1453), 470 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1453 transitions. [2022-01-28 14:54:45,803 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1453 transitions. Word has length 20 [2022-01-28 14:54:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:45,803 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1453 transitions. [2022-01-28 14:54:45,803 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) [2022-01-28 14:54:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1453 transitions. [2022-01-28 14:54:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:45,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:45,804 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:45,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:46,004 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 [2022-01-28 14:54:46,004 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:46,005 INFO L85 PathProgramCache]: Analyzing trace with hash -59516404, now seen corresponding path program 261 times [2022-01-28 14:54:46,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:46,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594597358] [2022-01-28 14:54:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:46,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:46,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:46,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594597358] [2022-01-28 14:54:46,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594597358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:46,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720650806] [2022-01-28 14:54:46,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:46,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:46,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:46,122 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) [2022-01-28 14:54:46,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-28 14:54:46,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:54:46,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:46,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:46,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:46,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:46,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:46,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:46,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:46,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:46,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:46,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:46,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:46,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:46,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720650806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:46,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:46,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:54:46,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903958495] [2022-01-28 14:54:46,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:46,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:54:46,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:46,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:54:46,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:54:46,512 INFO L87 Difference]: Start difference. First operand 471 states and 1453 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) [2022-01-28 14:54:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:47,305 INFO L93 Difference]: Finished difference Result 1090 states and 3281 transitions. [2022-01-28 14:54:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:54:47,305 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 [2022-01-28 14:54:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:47,307 INFO L225 Difference]: With dead ends: 1090 [2022-01-28 14:54:47,307 INFO L226 Difference]: Without dead ends: 1036 [2022-01-28 14:54:47,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:54:47,308 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:47,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 286 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 584 Invalid, 0 Unknown, 281 Unchecked, 0.3s Time] [2022-01-28 14:54:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-01-28 14:54:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 480. [2022-01-28 14:54:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.096033402922756) internal successors, (1483), 479 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1483 transitions. [2022-01-28 14:54:47,318 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1483 transitions. Word has length 21 [2022-01-28 14:54:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:47,318 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1483 transitions. [2022-01-28 14:54:47,318 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) [2022-01-28 14:54:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1483 transitions. [2022-01-28 14:54:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:47,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:47,319 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:47,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:47,535 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 [2022-01-28 14:54:47,535 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:47,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1654908243, now seen corresponding path program 262 times [2022-01-28 14:54:47,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:47,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908636247] [2022-01-28 14:54:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:47,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:47,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908636247] [2022-01-28 14:54:47,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908636247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619986498] [2022-01-28 14:54:47,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:47,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:47,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:47,648 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) [2022-01-28 14:54:47,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-28 14:54:47,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:47,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:47,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:47,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:47,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:47,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:47,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:47,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:47,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:47,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:47,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:48,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:48,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:48,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:48,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:48,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619986498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:48,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:48,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:54:48,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292745123] [2022-01-28 14:54:48,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:48,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:48,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:48,086 INFO L87 Difference]: Start difference. First operand 480 states and 1483 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) [2022-01-28 14:54:48,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:48,740 INFO L93 Difference]: Finished difference Result 948 states and 2841 transitions. [2022-01-28 14:54:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 14:54:48,740 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 [2022-01-28 14:54:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:48,741 INFO L225 Difference]: With dead ends: 948 [2022-01-28 14:54:48,742 INFO L226 Difference]: Without dead ends: 876 [2022-01-28 14:54:48,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 14:54:48,742 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:48,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 370 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 748 Invalid, 0 Unknown, 483 Unchecked, 0.3s Time] [2022-01-28 14:54:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-28 14:54:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 480. [2022-01-28 14:54:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.0918580375782883) internal successors, (1481), 479 states have internal predecessors, (1481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1481 transitions. [2022-01-28 14:54:48,748 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1481 transitions. Word has length 21 [2022-01-28 14:54:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:48,748 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 1481 transitions. [2022-01-28 14:54:48,748 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) [2022-01-28 14:54:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1481 transitions. [2022-01-28 14:54:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:48,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:48,749 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:48,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-01-28 14:54:48,949 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 [2022-01-28 14:54:48,950 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:48,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2002216596, now seen corresponding path program 263 times [2022-01-28 14:54:48,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:48,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387207676] [2022-01-28 14:54:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:48,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:49,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387207676] [2022-01-28 14:54:49,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387207676] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632170278] [2022-01-28 14:54:49,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:49,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:49,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:49,053 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) [2022-01-28 14:54:49,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-28 14:54:49,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:49,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:49,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:49,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:49,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:49,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:49,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:49,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:49,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:49,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:49,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:49,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:49,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:49,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632170278] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:49,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:49,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:54:49,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904087816] [2022-01-28 14:54:49,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:49,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:54:49,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:54:49,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:54:49,483 INFO L87 Difference]: Start difference. First operand 480 states and 1481 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) [2022-01-28 14:54:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:49,765 INFO L93 Difference]: Finished difference Result 772 states and 2385 transitions. [2022-01-28 14:54:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:54:49,765 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 [2022-01-28 14:54:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:49,766 INFO L225 Difference]: With dead ends: 772 [2022-01-28 14:54:49,767 INFO L226 Difference]: Without dead ends: 753 [2022-01-28 14:54:49,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:54:49,767 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 82 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:49,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 198 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 370 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-01-28 14:54:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-28 14:54:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 482. [2022-01-28 14:54:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0893970893970892) internal successors, (1486), 481 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1486 transitions. [2022-01-28 14:54:49,773 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1486 transitions. Word has length 21 [2022-01-28 14:54:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:49,773 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1486 transitions. [2022-01-28 14:54:49,773 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) [2022-01-28 14:54:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1486 transitions. [2022-01-28 14:54:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:49,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:49,774 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:49,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:49,995 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 [2022-01-28 14:54:49,995 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:49,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1294687500, now seen corresponding path program 264 times [2022-01-28 14:54:49,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:49,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409121259] [2022-01-28 14:54:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:49,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:50,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:50,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409121259] [2022-01-28 14:54:50,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409121259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:50,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712529964] [2022-01-28 14:54:50,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:50,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:50,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:50,102 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) [2022-01-28 14:54:50,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-28 14:54:50,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:54:50,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:50,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:50,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:50,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:50,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:50,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:50,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:50,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:50,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:50,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:50,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:50,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:50,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:50,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:50,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712529964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:50,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:50,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:54:50,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739723257] [2022-01-28 14:54:50,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:50,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:54:50,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:54:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:54:50,501 INFO L87 Difference]: Start difference. First operand 482 states and 1486 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) [2022-01-28 14:54:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:51,384 INFO L93 Difference]: Finished difference Result 1108 states and 3367 transitions. [2022-01-28 14:54:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 14:54:51,384 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 [2022-01-28 14:54:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:51,386 INFO L225 Difference]: With dead ends: 1108 [2022-01-28 14:54:51,386 INFO L226 Difference]: Without dead ends: 1085 [2022-01-28 14:54:51,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:54:51,387 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 186 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:51,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 290 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 883 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-01-28 14:54:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-01-28 14:54:51,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 482. [2022-01-28 14:54:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.0893970893970892) internal successors, (1486), 481 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1486 transitions. [2022-01-28 14:54:51,394 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1486 transitions. Word has length 21 [2022-01-28 14:54:51,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:51,394 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1486 transitions. [2022-01-28 14:54:51,394 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) [2022-01-28 14:54:51,394 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1486 transitions. [2022-01-28 14:54:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:51,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:51,395 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:51,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-01-28 14:54:51,595 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 [2022-01-28 14:54:51,595 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:51,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:51,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1025293522, now seen corresponding path program 265 times [2022-01-28 14:54:51,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:51,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293361524] [2022-01-28 14:54:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:51,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:51,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:51,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293361524] [2022-01-28 14:54:51,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293361524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:51,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871393520] [2022-01-28 14:54:51,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:54:51,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:51,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:51,703 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) [2022-01-28 14:54:51,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-28 14:54:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:51,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:51,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:51,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:51,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:51,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:51,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:52,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:52,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:52,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:52,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:52,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:52,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871393520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:52,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:52,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:54:52,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808068435] [2022-01-28 14:54:52,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:52,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:52,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:52,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:52,134 INFO L87 Difference]: Start difference. First operand 482 states and 1486 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) [2022-01-28 14:54:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:52,911 INFO L93 Difference]: Finished difference Result 885 states and 2655 transitions. [2022-01-28 14:54:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 14:54:52,911 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 [2022-01-28 14:54:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:52,912 INFO L225 Difference]: With dead ends: 885 [2022-01-28 14:54:52,912 INFO L226 Difference]: Without dead ends: 866 [2022-01-28 14:54:52,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 14:54:52,913 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 155 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:52,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 215 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 682 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-01-28 14:54:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-01-28 14:54:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 488. [2022-01-28 14:54:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.090349075975359) internal successors, (1505), 487 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1505 transitions. [2022-01-28 14:54:52,919 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1505 transitions. Word has length 21 [2022-01-28 14:54:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:52,919 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1505 transitions. [2022-01-28 14:54:52,919 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) [2022-01-28 14:54:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1505 transitions. [2022-01-28 14:54:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:52,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:52,920 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] [2022-01-28 14:54:52,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:53,120 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 [2022-01-28 14:54:53,120 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:53,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1749072051, now seen corresponding path program 266 times [2022-01-28 14:54:53,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:53,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034614655] [2022-01-28 14:54:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:53,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:53,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:53,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034614655] [2022-01-28 14:54:53,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034614655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:53,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304081268] [2022-01-28 14:54:53,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:54:53,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:53,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:53,230 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) [2022-01-28 14:54:53,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-28 14:54:53,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:54:53,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:53,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:53,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:53,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:53,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:53,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:53,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:53,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:53,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:53,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:53,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:53,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:53,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:53,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:53,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304081268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:53,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:53,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:54:53,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682719163] [2022-01-28 14:54:53,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:53,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:53,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:53,680 INFO L87 Difference]: Start difference. First operand 488 states and 1505 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) [2022-01-28 14:54:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:54,153 INFO L93 Difference]: Finished difference Result 837 states and 2515 transitions. [2022-01-28 14:54:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:54:54,153 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 [2022-01-28 14:54:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:54,154 INFO L225 Difference]: With dead ends: 837 [2022-01-28 14:54:54,154 INFO L226 Difference]: Without dead ends: 777 [2022-01-28 14:54:54,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:54:54,155 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:54,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 210 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 602 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-01-28 14:54:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-01-28 14:54:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 493. [2022-01-28 14:54:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.08739837398374) internal successors, (1519), 492 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1519 transitions. [2022-01-28 14:54:54,161 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1519 transitions. Word has length 21 [2022-01-28 14:54:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:54,161 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1519 transitions. [2022-01-28 14:54:54,162 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) [2022-01-28 14:54:54,162 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1519 transitions. [2022-01-28 14:54:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:54,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:54,162 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] [2022-01-28 14:54:54,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-01-28 14:54:54,362 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 [2022-01-28 14:54:54,363 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:54,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash 27230322, now seen corresponding path program 267 times [2022-01-28 14:54:54,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:54,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440022628] [2022-01-28 14:54:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:54,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:54,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:54,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440022628] [2022-01-28 14:54:54,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440022628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:54,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032263764] [2022-01-28 14:54:54,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:54:54,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:54,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:54,472 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) [2022-01-28 14:54:54,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-28 14:54:54,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:54:54,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:54,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:54,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:54,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:54,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:54,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:54,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:54:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:54,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:54,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:54,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:54,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:54,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:54,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:54,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:54,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032263764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:54,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:54,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:54:54,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552768194] [2022-01-28 14:54:54,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:54,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:54,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:54,889 INFO L87 Difference]: Start difference. First operand 493 states and 1519 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) [2022-01-28 14:54:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:55,710 INFO L93 Difference]: Finished difference Result 1010 states and 3040 transitions. [2022-01-28 14:54:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 14:54:55,710 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 [2022-01-28 14:54:55,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:55,712 INFO L225 Difference]: With dead ends: 1010 [2022-01-28 14:54:55,712 INFO L226 Difference]: Without dead ends: 987 [2022-01-28 14:54:55,712 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 [2022-01-28 14:54:55,712 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 143 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:55,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 306 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 920 Invalid, 0 Unknown, 150 Unchecked, 0.4s Time] [2022-01-28 14:54:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-01-28 14:54:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 489. [2022-01-28 14:54:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.0881147540983607) internal successors, (1507), 488 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1507 transitions. [2022-01-28 14:54:55,719 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1507 transitions. Word has length 21 [2022-01-28 14:54:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:55,719 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1507 transitions. [2022-01-28 14:54:55,719 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) [2022-01-28 14:54:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1507 transitions. [2022-01-28 14:54:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:55,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:55,720 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] [2022-01-28 14:54:55,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-01-28 14:54:55,920 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 [2022-01-28 14:54:55,920 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:55,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:55,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1067466120, now seen corresponding path program 268 times [2022-01-28 14:54:55,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:55,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92094571] [2022-01-28 14:54:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:55,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:56,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:56,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92094571] [2022-01-28 14:54:56,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92094571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:56,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976032940] [2022-01-28 14:54:56,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:54:56,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:56,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:56,028 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) [2022-01-28 14:54:56,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-28 14:54:56,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:54:56,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:56,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:56,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:56,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:56,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:56,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:56,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:56,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:56,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:56,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:56,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:56,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:56,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:56,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:56,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976032940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:56,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:56,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:54:56,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851676933] [2022-01-28 14:54:56,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:56,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:56,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:56,420 INFO L87 Difference]: Start difference. First operand 489 states and 1507 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) [2022-01-28 14:54:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:57,362 INFO L93 Difference]: Finished difference Result 918 states and 2747 transitions. [2022-01-28 14:54:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 14:54:57,363 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 [2022-01-28 14:54:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:57,364 INFO L225 Difference]: With dead ends: 918 [2022-01-28 14:54:57,364 INFO L226 Difference]: Without dead ends: 891 [2022-01-28 14:54:57,364 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 [2022-01-28 14:54:57,364 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 126 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:57,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 290 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:54:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-01-28 14:54:57,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 490. [2022-01-28 14:54:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.0920245398773005) internal successors, (1512), 489 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:57,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1512 transitions. [2022-01-28 14:54:57,371 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1512 transitions. Word has length 21 [2022-01-28 14:54:57,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:57,371 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1512 transitions. [2022-01-28 14:54:57,371 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) [2022-01-28 14:54:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1512 transitions. [2022-01-28 14:54:57,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:57,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:57,372 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:57,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-01-28 14:54:57,572 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 [2022-01-28 14:54:57,572 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:57,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:57,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1670707117, now seen corresponding path program 269 times [2022-01-28 14:54:57,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:57,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967284764] [2022-01-28 14:54:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:57,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:57,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:57,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967284764] [2022-01-28 14:54:57,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967284764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:57,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895820479] [2022-01-28 14:54:57,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:54:57,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:57,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:57,688 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) [2022-01-28 14:54:57,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-28 14:54:57,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:54:57,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:57,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:57,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:57,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:57,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:57,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:57,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:57,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:57,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:57,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:58,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:58,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:58,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:58,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:58,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895820479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:58,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:58,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:54:58,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067407254] [2022-01-28 14:54:58,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:58,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:54:58,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:54:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:54:58,110 INFO L87 Difference]: Start difference. First operand 490 states and 1512 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) [2022-01-28 14:54:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:54:58,874 INFO L93 Difference]: Finished difference Result 848 states and 2554 transitions. [2022-01-28 14:54:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:54:58,874 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 [2022-01-28 14:54:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:54:58,875 INFO L225 Difference]: With dead ends: 848 [2022-01-28 14:54:58,875 INFO L226 Difference]: Without dead ends: 821 [2022-01-28 14:54:58,875 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 [2022-01-28 14:54:58,876 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:54:58,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 253 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:54:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-28 14:54:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 504. [2022-01-28 14:54:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.0934393638170974) internal successors, (1556), 503 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:54:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1556 transitions. [2022-01-28 14:54:58,882 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1556 transitions. Word has length 21 [2022-01-28 14:54:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:54:58,882 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1556 transitions. [2022-01-28 14:54:58,882 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) [2022-01-28 14:54:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1556 transitions. [2022-01-28 14:54:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:54:58,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:54:58,883 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:54:58,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-28 14:54:59,083 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 [2022-01-28 14:54:59,083 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:54:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:54:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash 672643917, now seen corresponding path program 270 times [2022-01-28 14:54:59,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:54:59,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515738217] [2022-01-28 14:54:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:54:59,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:54:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:54:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:59,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:54:59,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515738217] [2022-01-28 14:54:59,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515738217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:54:59,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074954546] [2022-01-28 14:54:59,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:54:59,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:54:59,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:54:59,228 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) [2022-01-28 14:54:59,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-28 14:54:59,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:54:59,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:54:59,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:54:59,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:54:59,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:59,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:59,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:54:59,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:54:59,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:59,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:54:59,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:59,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:54:59,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:59,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:59,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:54:59,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:54:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:54:59,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074954546] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:54:59,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:54:59,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:54:59,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045669044] [2022-01-28 14:54:59,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:54:59,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:54:59,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:54:59,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:54:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:54:59,641 INFO L87 Difference]: Start difference. First operand 504 states and 1556 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) [2022-01-28 14:55:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:00,136 INFO L93 Difference]: Finished difference Result 730 states and 2199 transitions. [2022-01-28 14:55:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:55:00,136 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 [2022-01-28 14:55:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:00,138 INFO L225 Difference]: With dead ends: 730 [2022-01-28 14:55:00,138 INFO L226 Difference]: Without dead ends: 709 [2022-01-28 14:55:00,138 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 [2022-01-28 14:55:00,138 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:00,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 199 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-28 14:55:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 498. [2022-01-28 14:55:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.1006036217303823) internal successors, (1541), 497 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) [2022-01-28 14:55:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1541 transitions. [2022-01-28 14:55:00,149 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1541 transitions. Word has length 21 [2022-01-28 14:55:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:00,149 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1541 transitions. [2022-01-28 14:55:00,149 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) [2022-01-28 14:55:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1541 transitions. [2022-01-28 14:55:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:00,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:00,150 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:00,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-01-28 14:55:00,350 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 [2022-01-28 14:55:00,350 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash -474877415, now seen corresponding path program 271 times [2022-01-28 14:55:00,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:00,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467690807] [2022-01-28 14:55:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:00,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:00,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467690807] [2022-01-28 14:55:00,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467690807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:00,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341495127] [2022-01-28 14:55:00,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:00,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:00,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:00,430 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) [2022-01-28 14:55:00,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-28 14:55:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:00,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:00,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:00,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:00,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:00,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:00,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:00,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:00,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:00,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:00,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:00,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:00,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341495127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:00,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:00,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:55:00,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628785053] [2022-01-28 14:55:00,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:00,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:55:00,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:00,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:55:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:55:00,706 INFO L87 Difference]: Start difference. First operand 498 states and 1541 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) [2022-01-28 14:55:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:00,930 INFO L93 Difference]: Finished difference Result 706 states and 2150 transitions. [2022-01-28 14:55:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:00,930 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 [2022-01-28 14:55:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:00,931 INFO L225 Difference]: With dead ends: 706 [2022-01-28 14:55:00,931 INFO L226 Difference]: Without dead ends: 684 [2022-01-28 14:55:00,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:00,931 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:00,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 152 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-28 14:55:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 513. [2022-01-28 14:55:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 3.119140625) internal successors, (1597), 512 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1597 transitions. [2022-01-28 14:55:00,937 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1597 transitions. Word has length 21 [2022-01-28 14:55:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:00,938 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1597 transitions. [2022-01-28 14:55:00,938 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) [2022-01-28 14:55:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1597 transitions. [2022-01-28 14:55:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:00,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:00,938 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:00,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-01-28 14:55:01,138 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 [2022-01-28 14:55:01,139 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1877389689, now seen corresponding path program 272 times [2022-01-28 14:55:01,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:01,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776826108] [2022-01-28 14:55:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:01,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:01,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:01,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776826108] [2022-01-28 14:55:01,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776826108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554391647] [2022-01-28 14:55:01,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:01,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:01,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:01,227 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) [2022-01-28 14:55:01,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-28 14:55:01,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:01,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:01,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:01,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:01,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:01,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:01,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:01,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:01,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:01,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:01,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:01,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:01,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554391647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:01,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:01,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:55:01,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190968049] [2022-01-28 14:55:01,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:01,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:55:01,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:01,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:55:01,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:55:01,513 INFO L87 Difference]: Start difference. First operand 513 states and 1597 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) [2022-01-28 14:55:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:01,701 INFO L93 Difference]: Finished difference Result 662 states and 2017 transitions. [2022-01-28 14:55:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:01,701 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 [2022-01-28 14:55:01,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:01,702 INFO L225 Difference]: With dead ends: 662 [2022-01-28 14:55:01,702 INFO L226 Difference]: Without dead ends: 618 [2022-01-28 14:55:01,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:55:01,702 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:01,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 142 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-28 14:55:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 514. [2022-01-28 14:55:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.120857699805068) internal successors, (1601), 513 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:01,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1601 transitions. [2022-01-28 14:55:01,708 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1601 transitions. Word has length 21 [2022-01-28 14:55:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:01,708 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1601 transitions. [2022-01-28 14:55:01,708 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) [2022-01-28 14:55:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1601 transitions. [2022-01-28 14:55:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:01,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:01,709 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] [2022-01-28 14:55:01,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-01-28 14:55:01,909 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 [2022-01-28 14:55:01,909 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:01,909 INFO L85 PathProgramCache]: Analyzing trace with hash 602537365, now seen corresponding path program 273 times [2022-01-28 14:55:01,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:01,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092082122] [2022-01-28 14:55:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:01,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:02,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:02,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092082122] [2022-01-28 14:55:02,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092082122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:02,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897711992] [2022-01-28 14:55:02,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:02,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:02,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:02,008 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) [2022-01-28 14:55:02,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-28 14:55:02,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:02,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:02,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:02,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:02,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:02,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:02,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:02,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:02,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:02,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:02,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:02,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:02,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897711992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:02,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:02,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:55:02,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293070156] [2022-01-28 14:55:02,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:02,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:55:02,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:55:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:02,338 INFO L87 Difference]: Start difference. First operand 514 states and 1601 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2022-01-28 14:55:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:02,506 INFO L93 Difference]: Finished difference Result 640 states and 1959 transitions. [2022-01-28 14:55:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:02,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 [2022-01-28 14:55:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:02,507 INFO L225 Difference]: With dead ends: 640 [2022-01-28 14:55:02,507 INFO L226 Difference]: Without dead ends: 618 [2022-01-28 14:55:02,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:02,507 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:02,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 136 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 414 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-01-28 14:55:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-28 14:55:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 512. [2022-01-28 14:55:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.1291585127201564) internal successors, (1599), 511 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1599 transitions. [2022-01-28 14:55:02,513 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1599 transitions. Word has length 21 [2022-01-28 14:55:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:02,513 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1599 transitions. [2022-01-28 14:55:02,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2022-01-28 14:55:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1599 transitions. [2022-01-28 14:55:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:02,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:02,514 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:02,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-01-28 14:55:02,714 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 [2022-01-28 14:55:02,714 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1157941808, now seen corresponding path program 274 times [2022-01-28 14:55:02,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:02,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446698298] [2022-01-28 14:55:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:02,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:02,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:02,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446698298] [2022-01-28 14:55:02,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446698298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:02,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992786042] [2022-01-28 14:55:02,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:02,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:02,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:02,800 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) [2022-01-28 14:55:02,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-28 14:55:02,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:02,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:02,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:02,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:02,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:02,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:03,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:03,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:03,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:03,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:03,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:03,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:03,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992786042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:03,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:03,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-28 14:55:03,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069219397] [2022-01-28 14:55:03,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:03,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:55:03,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:03,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:55:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:03,192 INFO L87 Difference]: Start difference. First operand 512 states and 1599 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) [2022-01-28 14:55:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:04,067 INFO L93 Difference]: Finished difference Result 1005 states and 3027 transitions. [2022-01-28 14:55:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:55:04,067 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 [2022-01-28 14:55:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:04,069 INFO L225 Difference]: With dead ends: 1005 [2022-01-28 14:55:04,069 INFO L226 Difference]: Without dead ends: 986 [2022-01-28 14:55:04,069 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 [2022-01-28 14:55:04,069 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 200 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:04,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 231 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-01-28 14:55:04,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 518. [2022-01-28 14:55:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 3.147001934235977) internal successors, (1627), 517 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:04,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1627 transitions. [2022-01-28 14:55:04,076 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1627 transitions. Word has length 21 [2022-01-28 14:55:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:04,076 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1627 transitions. [2022-01-28 14:55:04,077 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) [2022-01-28 14:55:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1627 transitions. [2022-01-28 14:55:04,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:04,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:04,077 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] [2022-01-28 14:55:04,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-01-28 14:55:04,277 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 [2022-01-28 14:55:04,278 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1541633649, now seen corresponding path program 275 times [2022-01-28 14:55:04,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:04,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755916978] [2022-01-28 14:55:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:04,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:04,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:04,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755916978] [2022-01-28 14:55:04,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755916978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:04,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345385240] [2022-01-28 14:55:04,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:04,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:04,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:04,380 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) [2022-01-28 14:55:04,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-28 14:55:04,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:04,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:04,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:04,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:04,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:04,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:04,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:04,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:04,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:04,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:04,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:04,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:04,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345385240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:04,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:04,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:55:04,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825117770] [2022-01-28 14:55:04,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:04,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:55:04,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:55:04,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:55:04,768 INFO L87 Difference]: Start difference. First operand 518 states and 1627 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) [2022-01-28 14:55:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:05,678 INFO L93 Difference]: Finished difference Result 1017 states and 3091 transitions. [2022-01-28 14:55:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 14:55:05,678 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 [2022-01-28 14:55:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:05,679 INFO L225 Difference]: With dead ends: 1017 [2022-01-28 14:55:05,679 INFO L226 Difference]: Without dead ends: 978 [2022-01-28 14:55:05,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 14:55:05,680 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 220 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:05,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 308 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:55:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-28 14:55:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 520. [2022-01-28 14:55:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 3.1522157996146434) internal successors, (1636), 519 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1636 transitions. [2022-01-28 14:55:05,687 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1636 transitions. Word has length 21 [2022-01-28 14:55:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:05,687 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1636 transitions. [2022-01-28 14:55:05,687 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) [2022-01-28 14:55:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1636 transitions. [2022-01-28 14:55:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:05,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:05,688 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] [2022-01-28 14:55:05,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-01-28 14:55:05,888 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 [2022-01-28 14:55:05,888 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1194325296, now seen corresponding path program 276 times [2022-01-28 14:55:05,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:05,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66586260] [2022-01-28 14:55:05,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:05,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:05,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66586260] [2022-01-28 14:55:05,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66586260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:05,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135289214] [2022-01-28 14:55:05,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:05,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:05,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:05,995 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) [2022-01-28 14:55:05,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-28 14:55:06,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:55:06,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:06,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:06,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:06,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:06,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:06,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:06,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:06,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:06,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:06,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:06,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:06,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135289214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:06,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:06,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:55:06,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305566015] [2022-01-28 14:55:06,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:06,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:55:06,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:55:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:55:06,391 INFO L87 Difference]: Start difference. First operand 520 states and 1636 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) [2022-01-28 14:55:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:07,433 INFO L93 Difference]: Finished difference Result 1213 states and 3660 transitions. [2022-01-28 14:55:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:55:07,433 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 [2022-01-28 14:55:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:07,435 INFO L225 Difference]: With dead ends: 1213 [2022-01-28 14:55:07,435 INFO L226 Difference]: Without dead ends: 1194 [2022-01-28 14:55:07,435 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 [2022-01-28 14:55:07,435 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 227 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:07,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 302 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:55:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-01-28 14:55:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 522. [2022-01-28 14:55:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1497120921305184) internal successors, (1641), 521 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1641 transitions. [2022-01-28 14:55:07,443 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1641 transitions. Word has length 21 [2022-01-28 14:55:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:07,443 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1641 transitions. [2022-01-28 14:55:07,443 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) [2022-01-28 14:55:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1641 transitions. [2022-01-28 14:55:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:07,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:07,444 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:07,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-01-28 14:55:07,644 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 [2022-01-28 14:55:07,645 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:07,645 INFO L85 PathProgramCache]: Analyzing trace with hash 196262096, now seen corresponding path program 277 times [2022-01-28 14:55:07,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:07,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240182446] [2022-01-28 14:55:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:07,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:07,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:07,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240182446] [2022-01-28 14:55:07,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240182446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:07,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679209744] [2022-01-28 14:55:07,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:07,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:07,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:07,751 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) [2022-01-28 14:55:07,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-28 14:55:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:07,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:07,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:07,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:07,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:07,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:08,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:08,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:08,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:08,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:08,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:08,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:08,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679209744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:08,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:08,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:55:08,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161939668] [2022-01-28 14:55:08,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:08,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:08,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:08,119 INFO L87 Difference]: Start difference. First operand 522 states and 1641 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) [2022-01-28 14:55:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:08,866 INFO L93 Difference]: Finished difference Result 1071 states and 3247 transitions. [2022-01-28 14:55:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:55:08,866 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 [2022-01-28 14:55:08,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:08,868 INFO L225 Difference]: With dead ends: 1071 [2022-01-28 14:55:08,868 INFO L226 Difference]: Without dead ends: 1048 [2022-01-28 14:55:08,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:55:08,868 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:08,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 252 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-01-28 14:55:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 519. [2022-01-28 14:55:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.16023166023166) internal successors, (1637), 518 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1637 transitions. [2022-01-28 14:55:08,882 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1637 transitions. Word has length 21 [2022-01-28 14:55:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:08,882 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1637 transitions. [2022-01-28 14:55:08,882 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) [2022-01-28 14:55:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1637 transitions. [2022-01-28 14:55:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:08,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:08,882 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:08,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-01-28 14:55:09,083 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 [2022-01-28 14:55:09,083 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:09,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash 214132771, now seen corresponding path program 278 times [2022-01-28 14:55:09,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:09,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298629545] [2022-01-28 14:55:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:09,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:09,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:09,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298629545] [2022-01-28 14:55:09,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298629545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:09,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713847210] [2022-01-28 14:55:09,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:09,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:09,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:09,166 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) [2022-01-28 14:55:09,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-28 14:55:09,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:09,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:09,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:09,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:09,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:09,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:09,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:09,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:09,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:09,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:09,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:09,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:09,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:09,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:09,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713847210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:09,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:09,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:55:09,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722952648] [2022-01-28 14:55:09,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:09,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:55:09,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:09,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:55:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:55:09,467 INFO L87 Difference]: Start difference. First operand 519 states and 1637 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) [2022-01-28 14:55:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:09,678 INFO L93 Difference]: Finished difference Result 889 states and 2749 transitions. [2022-01-28 14:55:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:09,678 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 [2022-01-28 14:55:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:09,680 INFO L225 Difference]: With dead ends: 889 [2022-01-28 14:55:09,680 INFO L226 Difference]: Without dead ends: 867 [2022-01-28 14:55:09,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:09,680 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:09,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 140 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-01-28 14:55:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 522. [2022-01-28 14:55:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1573896353166986) internal successors, (1645), 521 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1645 transitions. [2022-01-28 14:55:09,687 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1645 transitions. Word has length 21 [2022-01-28 14:55:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:09,687 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1645 transitions. [2022-01-28 14:55:09,687 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) [2022-01-28 14:55:09,687 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1645 transitions. [2022-01-28 14:55:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:09,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:09,688 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] [2022-01-28 14:55:09,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-28 14:55:09,888 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 [2022-01-28 14:55:09,888 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 355093033, now seen corresponding path program 279 times [2022-01-28 14:55:09,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:09,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822984578] [2022-01-28 14:55:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:09,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:09,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822984578] [2022-01-28 14:55:09,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822984578] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221457262] [2022-01-28 14:55:09,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:09,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:09,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:10,000 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) [2022-01-28 14:55:10,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-28 14:55:10,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:10,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:10,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:10,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:10,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:10,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:10,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:10,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:10,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:10,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:10,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:10,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:10,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221457262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:10,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:10,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:55:10,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896977832] [2022-01-28 14:55:10,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:10,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:55:10,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:55:10,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:55:10,339 INFO L87 Difference]: Start difference. First operand 522 states and 1645 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) [2022-01-28 14:55:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:10,634 INFO L93 Difference]: Finished difference Result 791 states and 2455 transitions. [2022-01-28 14:55:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:10,634 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 [2022-01-28 14:55:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:10,635 INFO L225 Difference]: With dead ends: 791 [2022-01-28 14:55:10,635 INFO L226 Difference]: Without dead ends: 769 [2022-01-28 14:55:10,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:10,635 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:10,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 197 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-28 14:55:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 525. [2022-01-28 14:55:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.154580152671756) internal successors, (1653), 524 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1653 transitions. [2022-01-28 14:55:10,642 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1653 transitions. Word has length 21 [2022-01-28 14:55:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:10,642 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1653 transitions. [2022-01-28 14:55:10,642 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) [2022-01-28 14:55:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1653 transitions. [2022-01-28 14:55:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:10,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:10,642 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:10,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-28 14:55:10,843 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 [2022-01-28 14:55:10,843 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash 285590325, now seen corresponding path program 280 times [2022-01-28 14:55:10,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:10,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618916593] [2022-01-28 14:55:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:10,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:10,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:10,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618916593] [2022-01-28 14:55:10,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618916593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:10,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265958871] [2022-01-28 14:55:10,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:10,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:10,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:10,935 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) [2022-01-28 14:55:10,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-28 14:55:10,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:10,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:10,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:10,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:11,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:11,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:11,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:11,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:11,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:11,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:11,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:11,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:11,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:11,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:11,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:11,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265958871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:11,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:11,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:55:11,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013016759] [2022-01-28 14:55:11,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:11,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:55:11,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:55:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:55:11,262 INFO L87 Difference]: Start difference. First operand 525 states and 1653 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) [2022-01-28 14:55:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:11,519 INFO L93 Difference]: Finished difference Result 797 states and 2468 transitions. [2022-01-28 14:55:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:11,520 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 [2022-01-28 14:55:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:11,521 INFO L225 Difference]: With dead ends: 797 [2022-01-28 14:55:11,521 INFO L226 Difference]: Without dead ends: 768 [2022-01-28 14:55:11,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:11,521 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:11,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 162 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-28 14:55:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 525. [2022-01-28 14:55:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.154580152671756) internal successors, (1653), 524 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1653 transitions. [2022-01-28 14:55:11,527 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1653 transitions. Word has length 21 [2022-01-28 14:55:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:11,528 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1653 transitions. [2022-01-28 14:55:11,528 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) [2022-01-28 14:55:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1653 transitions. [2022-01-28 14:55:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:11,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:11,528 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:11,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:11,728 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 [2022-01-28 14:55:11,729 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1888127447, now seen corresponding path program 281 times [2022-01-28 14:55:11,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:11,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743381382] [2022-01-28 14:55:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:11,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:11,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743381382] [2022-01-28 14:55:11,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743381382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430168521] [2022-01-28 14:55:11,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:11,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:11,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:11,826 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) [2022-01-28 14:55:11,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-28 14:55:11,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:11,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:11,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:11,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:11,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:11,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:12,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:12,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:12,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:12,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:12,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:12,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:12,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430168521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:12,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:12,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:55:12,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297938039] [2022-01-28 14:55:12,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:12,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:12,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:12,152 INFO L87 Difference]: Start difference. First operand 525 states and 1653 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) [2022-01-28 14:55:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:12,323 INFO L93 Difference]: Finished difference Result 703 states and 2159 transitions. [2022-01-28 14:55:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:12,324 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 [2022-01-28 14:55:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:12,325 INFO L225 Difference]: With dead ends: 703 [2022-01-28 14:55:12,325 INFO L226 Difference]: Without dead ends: 659 [2022-01-28 14:55:12,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:12,325 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:12,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 128 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-01-28 14:55:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 528. [2022-01-28 14:55:12,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.153700189753321) internal successors, (1662), 527 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1662 transitions. [2022-01-28 14:55:12,331 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1662 transitions. Word has length 21 [2022-01-28 14:55:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:12,331 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1662 transitions. [2022-01-28 14:55:12,331 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) [2022-01-28 14:55:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1662 transitions. [2022-01-28 14:55:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:12,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:12,332 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] [2022-01-28 14:55:12,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-01-28 14:55:12,532 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 [2022-01-28 14:55:12,532 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1408776649, now seen corresponding path program 282 times [2022-01-28 14:55:12,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83152906] [2022-01-28 14:55:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:12,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:12,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:12,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83152906] [2022-01-28 14:55:12,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83152906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:12,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914023396] [2022-01-28 14:55:12,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:12,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:12,629 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) [2022-01-28 14:55:12,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-28 14:55:12,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:55:12,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:12,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:12,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:12,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:12,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:12,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:12,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:12,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:12,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:12,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:12,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:12,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:12,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914023396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:12,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:12,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:55:12,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546587054] [2022-01-28 14:55:12,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:12,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:55:12,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:55:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:12,959 INFO L87 Difference]: Start difference. First operand 528 states and 1662 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) [2022-01-28 14:55:13,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:13,173 INFO L93 Difference]: Finished difference Result 657 states and 2038 transitions. [2022-01-28 14:55:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:13,173 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 [2022-01-28 14:55:13,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:13,174 INFO L225 Difference]: With dead ends: 657 [2022-01-28 14:55:13,174 INFO L226 Difference]: Without dead ends: 635 [2022-01-28 14:55:13,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:13,175 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:13,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-28 14:55:13,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 525. [2022-01-28 14:55:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.154580152671756) internal successors, (1653), 524 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1653 transitions. [2022-01-28 14:55:13,181 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1653 transitions. Word has length 21 [2022-01-28 14:55:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:13,181 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1653 transitions. [2022-01-28 14:55:13,181 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) [2022-01-28 14:55:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1653 transitions. [2022-01-28 14:55:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:13,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:13,181 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:13,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-28 14:55:13,382 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 [2022-01-28 14:55:13,382 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:13,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:13,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1633067118, now seen corresponding path program 283 times [2022-01-28 14:55:13,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:13,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942194359] [2022-01-28 14:55:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:13,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:13,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942194359] [2022-01-28 14:55:13,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942194359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:13,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13935969] [2022-01-28 14:55:13,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:13,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:13,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:13,520 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) [2022-01-28 14:55:13,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-28 14:55:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:13,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:13,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:13,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:13,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:13,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:13,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:13,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:13,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:13,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:13,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:13,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:13,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:14,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:14,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:14,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13935969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:14,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:14,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:55:14,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359025446] [2022-01-28 14:55:14,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:14,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:55:14,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:55:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:14,037 INFO L87 Difference]: Start difference. First operand 525 states and 1653 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) [2022-01-28 14:55:15,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:15,074 INFO L93 Difference]: Finished difference Result 956 states and 2893 transitions. [2022-01-28 14:55:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 14:55:15,075 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 [2022-01-28 14:55:15,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:15,076 INFO L225 Difference]: With dead ends: 956 [2022-01-28 14:55:15,076 INFO L226 Difference]: Without dead ends: 937 [2022-01-28 14:55:15,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:55:15,077 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:15,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 316 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 990 Invalid, 0 Unknown, 106 Unchecked, 0.4s Time] [2022-01-28 14:55:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-01-28 14:55:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 528. [2022-01-28 14:55:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.159392789373814) internal successors, (1665), 527 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1665 transitions. [2022-01-28 14:55:15,084 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1665 transitions. Word has length 21 [2022-01-28 14:55:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:15,084 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1665 transitions. [2022-01-28 14:55:15,084 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) [2022-01-28 14:55:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1665 transitions. [2022-01-28 14:55:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:15,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:15,085 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] [2022-01-28 14:55:15,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-01-28 14:55:15,285 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 [2022-01-28 14:55:15,285 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash -112465395, now seen corresponding path program 284 times [2022-01-28 14:55:15,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:15,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471793850] [2022-01-28 14:55:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:15,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:15,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:15,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471793850] [2022-01-28 14:55:15,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471793850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:15,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204032247] [2022-01-28 14:55:15,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:15,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:15,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:15,410 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) [2022-01-28 14:55:15,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-28 14:55:15,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:15,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:15,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:15,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:15,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:15,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:15,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:15,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:15,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:15,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:15,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:15,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:15,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:15,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:15,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:15,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:15,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204032247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:15,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:15,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:55:15,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396968360] [2022-01-28 14:55:15,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:15,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:55:15,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:15,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:55:15,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:55:15,901 INFO L87 Difference]: Start difference. First operand 528 states and 1665 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) [2022-01-28 14:55:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:16,463 INFO L93 Difference]: Finished difference Result 929 states and 2814 transitions. [2022-01-28 14:55:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 14:55:16,463 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 [2022-01-28 14:55:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:16,465 INFO L225 Difference]: With dead ends: 929 [2022-01-28 14:55:16,465 INFO L226 Difference]: Without dead ends: 863 [2022-01-28 14:55:16,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:55:16,465 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:16,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 245 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 633 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2022-01-28 14:55:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-28 14:55:16,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 531. [2022-01-28 14:55:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1528301886792454) internal successors, (1671), 530 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1671 transitions. [2022-01-28 14:55:16,472 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1671 transitions. Word has length 21 [2022-01-28 14:55:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:16,472 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 1671 transitions. [2022-01-28 14:55:16,472 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) [2022-01-28 14:55:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1671 transitions. [2022-01-28 14:55:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:16,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:16,472 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:16,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-01-28 14:55:16,673 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 [2022-01-28 14:55:16,673 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:16,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1663836978, now seen corresponding path program 285 times [2022-01-28 14:55:16,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:16,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091731671] [2022-01-28 14:55:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:16,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:16,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091731671] [2022-01-28 14:55:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091731671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514043793] [2022-01-28 14:55:16,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:16,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:16,803 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) [2022-01-28 14:55:16,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-28 14:55:16,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:16,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:16,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:17,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:17,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:17,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:17,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:17,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:17,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:17,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:17,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:17,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:17,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:17,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:17,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514043793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:17,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:17,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:55:17,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372633044] [2022-01-28 14:55:17,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:17,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:55:17,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:17,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:55:17,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:17,401 INFO L87 Difference]: Start difference. First operand 531 states and 1671 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) [2022-01-28 14:55:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:18,368 INFO L93 Difference]: Finished difference Result 1114 states and 3343 transitions. [2022-01-28 14:55:18,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:55:18,368 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 [2022-01-28 14:55:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:18,370 INFO L225 Difference]: With dead ends: 1114 [2022-01-28 14:55:18,370 INFO L226 Difference]: Without dead ends: 1072 [2022-01-28 14:55:18,370 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 [2022-01-28 14:55:18,370 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 201 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:18,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 283 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 967 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2022-01-28 14:55:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-28 14:55:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 538. [2022-01-28 14:55:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 3.1564245810055866) internal successors, (1695), 537 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1695 transitions. [2022-01-28 14:55:18,378 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1695 transitions. Word has length 21 [2022-01-28 14:55:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:18,378 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1695 transitions. [2022-01-28 14:55:18,378 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) [2022-01-28 14:55:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1695 transitions. [2022-01-28 14:55:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:18,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:18,379 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:18,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-01-28 14:55:18,579 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 [2022-01-28 14:55:18,579 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:18,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1320687327, now seen corresponding path program 286 times [2022-01-28 14:55:18,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:18,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517364425] [2022-01-28 14:55:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:18,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:18,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:18,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517364425] [2022-01-28 14:55:18,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517364425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:18,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886163747] [2022-01-28 14:55:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:18,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:18,684 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) [2022-01-28 14:55:18,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-28 14:55:18,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:18,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:18,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:18,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:18,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:18,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:18,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:18,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:18,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:18,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:19,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:19,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:19,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:19,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:19,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:19,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:19,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886163747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:19,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:19,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:55:19,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167563127] [2022-01-28 14:55:19,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:19,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:19,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:19,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:19,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:19,109 INFO L87 Difference]: Start difference. First operand 538 states and 1695 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) [2022-01-28 14:55:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:19,285 INFO L93 Difference]: Finished difference Result 715 states and 2200 transitions. [2022-01-28 14:55:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:19,285 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 [2022-01-28 14:55:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:19,286 INFO L225 Difference]: With dead ends: 715 [2022-01-28 14:55:19,286 INFO L226 Difference]: Without dead ends: 671 [2022-01-28 14:55:19,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:19,286 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:19,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 470 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-01-28 14:55:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-28 14:55:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 538. [2022-01-28 14:55:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 3.1564245810055866) internal successors, (1695), 537 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1695 transitions. [2022-01-28 14:55:19,292 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1695 transitions. Word has length 21 [2022-01-28 14:55:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:19,292 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1695 transitions. [2022-01-28 14:55:19,292 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) [2022-01-28 14:55:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1695 transitions. [2022-01-28 14:55:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:19,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:19,293 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] [2022-01-28 14:55:19,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-01-28 14:55:19,493 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 [2022-01-28 14:55:19,493 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:19,494 INFO L85 PathProgramCache]: Analyzing trace with hash -333652906, now seen corresponding path program 287 times [2022-01-28 14:55:19,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:19,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122722770] [2022-01-28 14:55:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:19,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:19,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:19,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122722770] [2022-01-28 14:55:19,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122722770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:19,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990106218] [2022-01-28 14:55:19,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:19,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:19,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:19,622 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) [2022-01-28 14:55:19,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-28 14:55:19,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:55:19,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:19,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:19,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:19,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:19,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:19,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:19,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:20,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:20,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:20,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:20,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:20,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:20,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990106218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:20,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:20,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:55:20,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162898285] [2022-01-28 14:55:20,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:20,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:55:20,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:20,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:55:20,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:20,113 INFO L87 Difference]: Start difference. First operand 538 states and 1695 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) [2022-01-28 14:55:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:21,254 INFO L93 Difference]: Finished difference Result 969 states and 2930 transitions. [2022-01-28 14:55:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:55:21,254 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 [2022-01-28 14:55:21,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:21,256 INFO L225 Difference]: With dead ends: 969 [2022-01-28 14:55:21,256 INFO L226 Difference]: Without dead ends: 946 [2022-01-28 14:55:21,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1508, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:55:21,256 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 149 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:21,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 387 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1265 Invalid, 0 Unknown, 211 Unchecked, 0.5s Time] [2022-01-28 14:55:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-01-28 14:55:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 530. [2022-01-28 14:55:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.1587901701323253) internal successors, (1671), 529 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1671 transitions. [2022-01-28 14:55:21,263 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1671 transitions. Word has length 21 [2022-01-28 14:55:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:21,264 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1671 transitions. [2022-01-28 14:55:21,264 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) [2022-01-28 14:55:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1671 transitions. [2022-01-28 14:55:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:21,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:21,264 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] [2022-01-28 14:55:21,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-01-28 14:55:21,464 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 [2022-01-28 14:55:21,465 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:21,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:21,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1913959446, now seen corresponding path program 288 times [2022-01-28 14:55:21,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:21,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992935365] [2022-01-28 14:55:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:21,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:21,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:21,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992935365] [2022-01-28 14:55:21,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992935365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:21,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644322173] [2022-01-28 14:55:21,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:21,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:21,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:21,602 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) [2022-01-28 14:55:21,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-28 14:55:21,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:55:21,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:21,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:21,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:21,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:21,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:21,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:21,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:21,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:21,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:22,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:22,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:22,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:22,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:22,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644322173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:22,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:22,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:55:22,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587262042] [2022-01-28 14:55:22,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:22,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:55:22,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:22,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:55:22,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:22,074 INFO L87 Difference]: Start difference. First operand 530 states and 1671 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) [2022-01-28 14:55:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:23,131 INFO L93 Difference]: Finished difference Result 966 states and 2924 transitions. [2022-01-28 14:55:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:55:23,132 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 [2022-01-28 14:55:23,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:23,133 INFO L225 Difference]: With dead ends: 966 [2022-01-28 14:55:23,133 INFO L226 Difference]: Without dead ends: 947 [2022-01-28 14:55:23,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 14:55:23,134 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 168 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:23,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 294 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 980 Invalid, 0 Unknown, 128 Unchecked, 0.4s Time] [2022-01-28 14:55:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-01-28 14:55:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 529. [2022-01-28 14:55:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.1553030303030303) internal successors, (1666), 528 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1666 transitions. [2022-01-28 14:55:23,144 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1666 transitions. Word has length 21 [2022-01-28 14:55:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:23,144 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1666 transitions. [2022-01-28 14:55:23,144 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) [2022-01-28 14:55:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1666 transitions. [2022-01-28 14:55:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:23,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:23,145 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] [2022-01-28 14:55:23,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-01-28 14:55:23,363 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 [2022-01-28 14:55:23,363 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1327307979, now seen corresponding path program 289 times [2022-01-28 14:55:23,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:23,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379513258] [2022-01-28 14:55:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:23,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:23,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379513258] [2022-01-28 14:55:23,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379513258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256118708] [2022-01-28 14:55:23,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:23,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:23,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:23,469 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) [2022-01-28 14:55:23,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-28 14:55:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:23,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:23,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:23,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:23,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:23,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:23,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:23,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:23,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:23,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:23,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:23,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:23,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:23,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:23,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256118708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:23,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:23,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:55:23,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563389090] [2022-01-28 14:55:23,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:23,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:23,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:23,912 INFO L87 Difference]: Start difference. First operand 529 states and 1666 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) [2022-01-28 14:55:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:24,070 INFO L93 Difference]: Finished difference Result 684 states and 2104 transitions. [2022-01-28 14:55:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:55:24,070 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 [2022-01-28 14:55:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:24,071 INFO L225 Difference]: With dead ends: 684 [2022-01-28 14:55:24,071 INFO L226 Difference]: Without dead ends: 662 [2022-01-28 14:55:24,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:24,071 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:24,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 180 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 419 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-28 14:55:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-28 14:55:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 529. [2022-01-28 14:55:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.1553030303030303) internal successors, (1666), 528 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1666 transitions. [2022-01-28 14:55:24,077 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1666 transitions. Word has length 21 [2022-01-28 14:55:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:24,077 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1666 transitions. [2022-01-28 14:55:24,077 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) [2022-01-28 14:55:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1666 transitions. [2022-01-28 14:55:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:24,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:24,078 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:24,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-01-28 14:55:24,278 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 [2022-01-28 14:55:24,278 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:24,278 INFO L85 PathProgramCache]: Analyzing trace with hash 57986761, now seen corresponding path program 290 times [2022-01-28 14:55:24,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:24,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813970033] [2022-01-28 14:55:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:24,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:24,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:24,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813970033] [2022-01-28 14:55:24,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813970033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:24,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247372099] [2022-01-28 14:55:24,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:24,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:24,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:24,384 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) [2022-01-28 14:55:24,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-28 14:55:24,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:24,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:24,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:24,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:24,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:24,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:24,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:24,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:24,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:24,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:24,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:24,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:24,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:24,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:24,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:24,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:24,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247372099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:24,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:24,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:55:24,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945924923] [2022-01-28 14:55:24,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:24,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:24,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:24,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:24,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:24,843 INFO L87 Difference]: Start difference. First operand 529 states and 1666 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) [2022-01-28 14:55:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:24,999 INFO L93 Difference]: Finished difference Result 666 states and 2044 transitions. [2022-01-28 14:55:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:55:24,999 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 [2022-01-28 14:55:25,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:25,001 INFO L225 Difference]: With dead ends: 666 [2022-01-28 14:55:25,001 INFO L226 Difference]: Without dead ends: 656 [2022-01-28 14:55:25,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:25,001 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:25,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 169 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 380 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-01-28 14:55:25,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-28 14:55:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 529. [2022-01-28 14:55:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.1553030303030303) internal successors, (1666), 528 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1666 transitions. [2022-01-28 14:55:25,007 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1666 transitions. Word has length 21 [2022-01-28 14:55:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:25,007 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1666 transitions. [2022-01-28 14:55:25,007 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) [2022-01-28 14:55:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1666 transitions. [2022-01-28 14:55:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:25,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:25,008 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:25,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:25,208 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 [2022-01-28 14:55:25,208 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:25,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:25,208 INFO L85 PathProgramCache]: Analyzing trace with hash 844040781, now seen corresponding path program 291 times [2022-01-28 14:55:25,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:25,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174502696] [2022-01-28 14:55:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:25,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:25,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:25,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174502696] [2022-01-28 14:55:25,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174502696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:25,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214098927] [2022-01-28 14:55:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:25,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:25,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:25,301 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) [2022-01-28 14:55:25,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-28 14:55:25,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:25,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:25,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:55:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:25,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:25,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:25,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:25,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:25,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:25,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:25,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:25,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:25,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:25,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:25,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:25,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214098927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:25,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:25,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-28 14:55:25,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013037868] [2022-01-28 14:55:25,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:25,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:55:25,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:25,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:55:25,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:25,978 INFO L87 Difference]: Start difference. First operand 529 states and 1666 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) [2022-01-28 14:55:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:26,979 INFO L93 Difference]: Finished difference Result 1098 states and 3292 transitions. [2022-01-28 14:55:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 14:55:26,979 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 [2022-01-28 14:55:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:26,981 INFO L225 Difference]: With dead ends: 1098 [2022-01-28 14:55:26,981 INFO L226 Difference]: Without dead ends: 1044 [2022-01-28 14:55:26,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:55:26,981 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 151 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:26,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 309 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 818 Invalid, 0 Unknown, 66 Unchecked, 0.4s Time] [2022-01-28 14:55:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-01-28 14:55:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 561. [2022-01-28 14:55:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 3.194642857142857) internal successors, (1789), 560 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1789 transitions. [2022-01-28 14:55:26,989 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1789 transitions. Word has length 21 [2022-01-28 14:55:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:26,989 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1789 transitions. [2022-01-28 14:55:26,989 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) [2022-01-28 14:55:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1789 transitions. [2022-01-28 14:55:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:26,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:26,990 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:27,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-01-28 14:55:27,190 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 [2022-01-28 14:55:27,190 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:27,191 INFO L85 PathProgramCache]: Analyzing trace with hash -11515947, now seen corresponding path program 292 times [2022-01-28 14:55:27,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:27,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223538054] [2022-01-28 14:55:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:27,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:27,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:27,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223538054] [2022-01-28 14:55:27,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223538054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:27,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029939721] [2022-01-28 14:55:27,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:27,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:27,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:27,299 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) [2022-01-28 14:55:27,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-28 14:55:27,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:27,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:27,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:27,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:27,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:27,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:27,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:27,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:27,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:27,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:27,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:27,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:27,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:27,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:27,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:27,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:27,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029939721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:27,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:27,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:55:27,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058721046] [2022-01-28 14:55:27,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:27,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:27,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:27,738 INFO L87 Difference]: Start difference. First operand 561 states and 1789 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) [2022-01-28 14:55:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:27,946 INFO L93 Difference]: Finished difference Result 797 states and 2463 transitions. [2022-01-28 14:55:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:55:27,946 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 [2022-01-28 14:55:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:27,947 INFO L225 Difference]: With dead ends: 797 [2022-01-28 14:55:27,947 INFO L226 Difference]: Without dead ends: 727 [2022-01-28 14:55:27,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:27,948 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:27,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 185 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 542 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-28 14:55:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-28 14:55:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 561. [2022-01-28 14:55:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 3.1892857142857145) internal successors, (1786), 560 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1786 transitions. [2022-01-28 14:55:27,962 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1786 transitions. Word has length 21 [2022-01-28 14:55:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:27,962 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1786 transitions. [2022-01-28 14:55:27,962 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) [2022-01-28 14:55:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1786 transitions. [2022-01-28 14:55:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:27,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:27,963 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:27,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-01-28 14:55:28,163 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 [2022-01-28 14:55:28,163 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1891058358, now seen corresponding path program 293 times [2022-01-28 14:55:28,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:28,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676422915] [2022-01-28 14:55:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:28,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:28,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:28,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676422915] [2022-01-28 14:55:28,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676422915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:28,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256397196] [2022-01-28 14:55:28,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:28,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:28,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:28,288 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) [2022-01-28 14:55:28,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-28 14:55:28,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:28,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:28,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:28,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:28,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:28,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:28,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:28,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:28,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:28,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:28,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:28,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:28,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:28,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:28,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256397196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:28,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:28,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:55:28,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189279069] [2022-01-28 14:55:28,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:28,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:28,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:28,707 INFO L87 Difference]: Start difference. First operand 561 states and 1786 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) [2022-01-28 14:55:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:29,427 INFO L93 Difference]: Finished difference Result 1002 states and 3067 transitions. [2022-01-28 14:55:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:55:29,427 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 [2022-01-28 14:55:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:29,429 INFO L225 Difference]: With dead ends: 1002 [2022-01-28 14:55:29,429 INFO L226 Difference]: Without dead ends: 979 [2022-01-28 14:55:29,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:55:29,429 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:29,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 213 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-01-28 14:55:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 561. [2022-01-28 14:55:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 3.1892857142857145) internal successors, (1786), 560 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1786 transitions. [2022-01-28 14:55:29,438 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1786 transitions. Word has length 21 [2022-01-28 14:55:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:29,438 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1786 transitions. [2022-01-28 14:55:29,438 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) [2022-01-28 14:55:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1786 transitions. [2022-01-28 14:55:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:29,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:29,439 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:29,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-01-28 14:55:29,639 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 [2022-01-28 14:55:29,639 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash 446944411, now seen corresponding path program 294 times [2022-01-28 14:55:29,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:29,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166332239] [2022-01-28 14:55:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:29,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:29,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:29,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166332239] [2022-01-28 14:55:29,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166332239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:29,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807741084] [2022-01-28 14:55:29,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:29,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:29,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:29,783 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) [2022-01-28 14:55:29,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-28 14:55:29,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:55:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:29,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:29,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:29,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:29,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:29,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:29,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:30,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:30,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:30,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:30,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:30,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:30,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:30,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807741084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:30,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:30,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:55:30,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539400011] [2022-01-28 14:55:30,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:30,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:55:30,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:30,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:55:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:30,240 INFO L87 Difference]: Start difference. First operand 561 states and 1786 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) [2022-01-28 14:55:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:30,831 INFO L93 Difference]: Finished difference Result 914 states and 2791 transitions. [2022-01-28 14:55:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:55:30,831 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 [2022-01-28 14:55:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:30,833 INFO L225 Difference]: With dead ends: 914 [2022-01-28 14:55:30,833 INFO L226 Difference]: Without dead ends: 893 [2022-01-28 14:55:30,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:55:30,833 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 138 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:30,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 246 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 752 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-01-28 14:55:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-28 14:55:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 559. [2022-01-28 14:55:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.184587813620072) internal successors, (1777), 558 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1777 transitions. [2022-01-28 14:55:30,841 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1777 transitions. Word has length 21 [2022-01-28 14:55:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:30,841 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1777 transitions. [2022-01-28 14:55:30,841 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) [2022-01-28 14:55:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1777 transitions. [2022-01-28 14:55:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:30,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:30,841 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:30,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-01-28 14:55:31,042 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 [2022-01-28 14:55:31,042 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:31,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:31,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1810346795, now seen corresponding path program 295 times [2022-01-28 14:55:31,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:31,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539063403] [2022-01-28 14:55:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:31,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:31,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:31,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539063403] [2022-01-28 14:55:31,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539063403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:31,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502706437] [2022-01-28 14:55:31,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:31,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:31,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:31,147 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) [2022-01-28 14:55:31,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-28 14:55:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:31,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:31,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:31,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:31,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:31,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:31,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:31,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:31,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:31,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:31,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:31,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:31,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:31,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:31,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:31,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:31,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502706437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:31,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:31,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:55:31,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649218314] [2022-01-28 14:55:31,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:31,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:31,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:31,559 INFO L87 Difference]: Start difference. First operand 559 states and 1777 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) [2022-01-28 14:55:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:31,674 INFO L93 Difference]: Finished difference Result 646 states and 2032 transitions. [2022-01-28 14:55:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:31,674 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 [2022-01-28 14:55:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:31,675 INFO L225 Difference]: With dead ends: 646 [2022-01-28 14:55:31,675 INFO L226 Difference]: Without dead ends: 624 [2022-01-28 14:55:31,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:31,676 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:31,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 107 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 299 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-01-28 14:55:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-28 14:55:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 562. [2022-01-28 14:55:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 3.1889483065953654) internal successors, (1789), 561 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1789 transitions. [2022-01-28 14:55:31,682 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1789 transitions. Word has length 21 [2022-01-28 14:55:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:31,682 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1789 transitions. [2022-01-28 14:55:31,682 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) [2022-01-28 14:55:31,682 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1789 transitions. [2022-01-28 14:55:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:31,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:31,683 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] [2022-01-28 14:55:31,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-01-28 14:55:31,883 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 [2022-01-28 14:55:31,883 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:31,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1707736245, now seen corresponding path program 296 times [2022-01-28 14:55:31,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:31,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785111484] [2022-01-28 14:55:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:31,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:31,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:31,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785111484] [2022-01-28 14:55:31,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785111484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:31,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955008853] [2022-01-28 14:55:31,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:31,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:31,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:31,982 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) [2022-01-28 14:55:31,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-28 14:55:32,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:32,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:32,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:32,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:32,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:32,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:32,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:32,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:32,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:32,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:32,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:32,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:32,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:32,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955008853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:32,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:32,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:55:32,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201119390] [2022-01-28 14:55:32,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:32,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:32,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:32,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:32,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:32,309 INFO L87 Difference]: Start difference. First operand 562 states and 1789 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) [2022-01-28 14:55:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:32,534 INFO L93 Difference]: Finished difference Result 687 states and 2131 transitions. [2022-01-28 14:55:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:32,534 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 [2022-01-28 14:55:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:32,535 INFO L225 Difference]: With dead ends: 687 [2022-01-28 14:55:32,535 INFO L226 Difference]: Without dead ends: 665 [2022-01-28 14:55:32,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:55:32,535 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:32,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 157 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-28 14:55:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 561. [2022-01-28 14:55:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 3.182142857142857) internal successors, (1782), 560 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1782 transitions. [2022-01-28 14:55:32,542 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1782 transitions. Word has length 21 [2022-01-28 14:55:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:32,542 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1782 transitions. [2022-01-28 14:55:32,542 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) [2022-01-28 14:55:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1782 transitions. [2022-01-28 14:55:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:32,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:32,542 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:32,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-01-28 14:55:32,743 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 [2022-01-28 14:55:32,743 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:32,743 INFO L85 PathProgramCache]: Analyzing trace with hash 830280268, now seen corresponding path program 297 times [2022-01-28 14:55:32,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:32,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446457810] [2022-01-28 14:55:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:32,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:32,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:32,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446457810] [2022-01-28 14:55:32,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446457810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:32,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731232034] [2022-01-28 14:55:32,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:32,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:32,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:32,876 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) [2022-01-28 14:55:32,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-28 14:55:32,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:55:32,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:32,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:32,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:32,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:33,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:33,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:33,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:33,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:33,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:33,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:33,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:33,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:33,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:33,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731232034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:33,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:33,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:55:33,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515519530] [2022-01-28 14:55:33,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:33,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:55:33,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:33,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:55:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:33,337 INFO L87 Difference]: Start difference. First operand 561 states and 1782 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) [2022-01-28 14:55:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:34,480 INFO L93 Difference]: Finished difference Result 1041 states and 3137 transitions. [2022-01-28 14:55:34,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:55:34,480 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 [2022-01-28 14:55:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:34,481 INFO L225 Difference]: With dead ends: 1041 [2022-01-28 14:55:34,481 INFO L226 Difference]: Without dead ends: 995 [2022-01-28 14:55:34,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=1824, Unknown=0, NotChecked=0, Total=2162 [2022-01-28 14:55:34,482 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 163 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:34,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 390 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1049 Invalid, 0 Unknown, 265 Unchecked, 0.4s Time] [2022-01-28 14:55:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-28 14:55:34,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 569. [2022-01-28 14:55:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.1795774647887325) internal successors, (1806), 568 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1806 transitions. [2022-01-28 14:55:34,496 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1806 transitions. Word has length 21 [2022-01-28 14:55:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:34,496 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1806 transitions. [2022-01-28 14:55:34,496 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) [2022-01-28 14:55:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1806 transitions. [2022-01-28 14:55:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:34,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:34,497 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:34,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-28 14:55:34,697 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 [2022-01-28 14:55:34,697 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1433521265, now seen corresponding path program 298 times [2022-01-28 14:55:34,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060074770] [2022-01-28 14:55:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:34,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:34,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060074770] [2022-01-28 14:55:34,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060074770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:34,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981756548] [2022-01-28 14:55:34,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:34,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:34,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:34,795 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) [2022-01-28 14:55:34,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-28 14:55:34,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:34,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:34,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:34,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:34,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:34,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:35,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:35,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:35,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:35,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:35,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:35,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:35,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981756548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:35,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:35,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:55:35,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122575711] [2022-01-28 14:55:35,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:35,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:35,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:35,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:35,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:35,203 INFO L87 Difference]: Start difference. First operand 569 states and 1806 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) [2022-01-28 14:55:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:35,977 INFO L93 Difference]: Finished difference Result 941 states and 2877 transitions. [2022-01-28 14:55:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:55:35,977 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 [2022-01-28 14:55:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:35,979 INFO L225 Difference]: With dead ends: 941 [2022-01-28 14:55:35,979 INFO L226 Difference]: Without dead ends: 914 [2022-01-28 14:55:35,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:55:35,979 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:35,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 252 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-01-28 14:55:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 574. [2022-01-28 14:55:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 3.1972076788830717) internal successors, (1832), 573 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1832 transitions. [2022-01-28 14:55:35,987 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1832 transitions. Word has length 21 [2022-01-28 14:55:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:35,987 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 1832 transitions. [2022-01-28 14:55:35,987 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) [2022-01-28 14:55:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1832 transitions. [2022-01-28 14:55:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:35,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:35,988 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] [2022-01-28 14:55:36,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-01-28 14:55:36,188 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 [2022-01-28 14:55:36,188 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1706836641, now seen corresponding path program 299 times [2022-01-28 14:55:36,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:36,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467769491] [2022-01-28 14:55:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:36,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:36,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:36,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467769491] [2022-01-28 14:55:36,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467769491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:36,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579670007] [2022-01-28 14:55:36,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:36,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:36,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:36,335 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) [2022-01-28 14:55:36,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-28 14:55:36,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:36,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:36,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:36,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:36,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:36,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:36,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:36,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:36,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:36,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:36,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:36,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:36,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:36,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:36,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:36,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:36,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:36,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579670007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:36,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:36,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:55:36,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160201743] [2022-01-28 14:55:36,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:36,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:55:36,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:36,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:55:36,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:36,748 INFO L87 Difference]: Start difference. First operand 574 states and 1832 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) [2022-01-28 14:55:36,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:36,886 INFO L93 Difference]: Finished difference Result 672 states and 2113 transitions. [2022-01-28 14:55:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:36,887 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 [2022-01-28 14:55:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:36,887 INFO L225 Difference]: With dead ends: 672 [2022-01-28 14:55:36,888 INFO L226 Difference]: Without dead ends: 643 [2022-01-28 14:55:36,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:36,888 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:36,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 359 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-01-28 14:55:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-28 14:55:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 573. [2022-01-28 14:55:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1923076923076925) internal successors, (1826), 572 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1826 transitions. [2022-01-28 14:55:36,894 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1826 transitions. Word has length 21 [2022-01-28 14:55:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:36,894 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1826 transitions. [2022-01-28 14:55:36,894 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) [2022-01-28 14:55:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1826 transitions. [2022-01-28 14:55:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:36,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:36,895 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:36,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-28 14:55:37,096 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 [2022-01-28 14:55:37,096 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:37,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:37,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2036655875, now seen corresponding path program 300 times [2022-01-28 14:55:37,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:37,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609869738] [2022-01-28 14:55:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:37,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:37,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:37,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609869738] [2022-01-28 14:55:37,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609869738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:37,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936153939] [2022-01-28 14:55:37,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:37,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:37,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:37,203 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) [2022-01-28 14:55:37,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-28 14:55:37,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:55:37,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:37,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:37,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:37,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:37,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:37,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:37,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:37,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:37,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:37,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:37,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:37,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:37,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:37,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:37,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:37,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936153939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:37,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:37,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:55:37,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652189986] [2022-01-28 14:55:37,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:37,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:37,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:37,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:37,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:37,610 INFO L87 Difference]: Start difference. First operand 573 states and 1826 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) [2022-01-28 14:55:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:37,779 INFO L93 Difference]: Finished difference Result 700 states and 2169 transitions. [2022-01-28 14:55:37,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:55:37,779 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 [2022-01-28 14:55:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:37,780 INFO L225 Difference]: With dead ends: 700 [2022-01-28 14:55:37,780 INFO L226 Difference]: Without dead ends: 671 [2022-01-28 14:55:37,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:37,780 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:37,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 242 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 435 Invalid, 0 Unknown, 302 Unchecked, 0.2s Time] [2022-01-28 14:55:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-01-28 14:55:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 573. [2022-01-28 14:55:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.1888111888111887) internal successors, (1824), 572 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1824 transitions. [2022-01-28 14:55:37,787 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1824 transitions. Word has length 21 [2022-01-28 14:55:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:37,787 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1824 transitions. [2022-01-28 14:55:37,787 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) [2022-01-28 14:55:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1824 transitions. [2022-01-28 14:55:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:37,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:37,788 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:37,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-01-28 14:55:37,988 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 [2022-01-28 14:55:37,988 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:37,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1251004468, now seen corresponding path program 301 times [2022-01-28 14:55:37,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:37,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538697992] [2022-01-28 14:55:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:37,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:38,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:38,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538697992] [2022-01-28 14:55:38,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538697992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:38,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360373817] [2022-01-28 14:55:38,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:38,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:38,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:38,086 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) [2022-01-28 14:55:38,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-28 14:55:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:38,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:38,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:38,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:38,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:38,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:38,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:38,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:38,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:38,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:38,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:38,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:38,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360373817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:38,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:38,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:55:38,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407350970] [2022-01-28 14:55:38,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:38,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:38,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:38,469 INFO L87 Difference]: Start difference. First operand 573 states and 1824 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) [2022-01-28 14:55:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:39,111 INFO L93 Difference]: Finished difference Result 884 states and 2711 transitions. [2022-01-28 14:55:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 14:55:39,112 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 [2022-01-28 14:55:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:39,113 INFO L225 Difference]: With dead ends: 884 [2022-01-28 14:55:39,113 INFO L226 Difference]: Without dead ends: 865 [2022-01-28 14:55:39,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:55:39,113 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 109 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:39,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 184 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-01-28 14:55:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 565. [2022-01-28 14:55:39,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.1950354609929077) internal successors, (1802), 564 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) [2022-01-28 14:55:39,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 1802 transitions. [2022-01-28 14:55:39,120 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 1802 transitions. Word has length 21 [2022-01-28 14:55:39,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:39,120 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 1802 transitions. [2022-01-28 14:55:39,120 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) [2022-01-28 14:55:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 1802 transitions. [2022-01-28 14:55:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:39,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:39,121 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] [2022-01-28 14:55:39,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:39,321 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 [2022-01-28 14:55:39,322 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:39,322 INFO L85 PathProgramCache]: Analyzing trace with hash -40628851, now seen corresponding path program 302 times [2022-01-28 14:55:39,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:39,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055968908] [2022-01-28 14:55:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:39,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:39,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:39,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055968908] [2022-01-28 14:55:39,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055968908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:39,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552968325] [2022-01-28 14:55:39,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:39,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:39,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:39,419 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) [2022-01-28 14:55:39,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-28 14:55:39,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:39,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:39,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:39,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:39,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:39,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:39,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:39,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:39,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:39,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:39,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:39,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:39,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552968325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:39,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:39,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:55:39,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98474532] [2022-01-28 14:55:39,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:39,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:39,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:39,796 INFO L87 Difference]: Start difference. First operand 565 states and 1802 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) [2022-01-28 14:55:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:40,274 INFO L93 Difference]: Finished difference Result 795 states and 2450 transitions. [2022-01-28 14:55:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:55:40,274 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 [2022-01-28 14:55:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:40,275 INFO L225 Difference]: With dead ends: 795 [2022-01-28 14:55:40,275 INFO L226 Difference]: Without dead ends: 774 [2022-01-28 14:55:40,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:55:40,276 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 113 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:40,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 201 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-01-28 14:55:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 559. [2022-01-28 14:55:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.1810035842293907) internal successors, (1775), 558 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1775 transitions. [2022-01-28 14:55:40,282 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1775 transitions. Word has length 21 [2022-01-28 14:55:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:40,282 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1775 transitions. [2022-01-28 14:55:40,282 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) [2022-01-28 14:55:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1775 transitions. [2022-01-28 14:55:40,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:40,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:40,283 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] [2022-01-28 14:55:40,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-01-28 14:55:40,483 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 [2022-01-28 14:55:40,483 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash -175037118, now seen corresponding path program 303 times [2022-01-28 14:55:40,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:40,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665603088] [2022-01-28 14:55:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:40,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:40,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:40,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665603088] [2022-01-28 14:55:40,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665603088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:40,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555667514] [2022-01-28 14:55:40,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:40,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:40,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:40,590 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) [2022-01-28 14:55:40,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-28 14:55:40,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:40,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:40,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:40,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:40,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:40,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:40,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:40,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:40,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:40,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:40,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:40,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:40,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:40,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555667514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:40,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:40,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:55:40,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983598075] [2022-01-28 14:55:40,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:40,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:40,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:40,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:40,984 INFO L87 Difference]: Start difference. First operand 559 states and 1775 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) [2022-01-28 14:55:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:41,772 INFO L93 Difference]: Finished difference Result 1107 states and 3376 transitions. [2022-01-28 14:55:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:55:41,772 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 [2022-01-28 14:55:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:41,774 INFO L225 Difference]: With dead ends: 1107 [2022-01-28 14:55:41,774 INFO L226 Difference]: Without dead ends: 1088 [2022-01-28 14:55:41,774 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 [2022-01-28 14:55:41,774 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 244 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:41,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 241 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-01-28 14:55:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 567. [2022-01-28 14:55:41,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.1925795053003534) internal successors, (1807), 566 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1807 transitions. [2022-01-28 14:55:41,782 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1807 transitions. Word has length 21 [2022-01-28 14:55:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:41,783 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1807 transitions. [2022-01-28 14:55:41,783 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) [2022-01-28 14:55:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1807 transitions. [2022-01-28 14:55:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:41,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:41,783 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:41,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-28 14:55:41,984 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 [2022-01-28 14:55:41,984 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1770428957, now seen corresponding path program 304 times [2022-01-28 14:55:41,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:41,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052924743] [2022-01-28 14:55:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:41,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:42,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052924743] [2022-01-28 14:55:42,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052924743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625325606] [2022-01-28 14:55:42,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:42,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:42,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:42,076 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) [2022-01-28 14:55:42,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-28 14:55:42,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:42,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:42,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:42,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:42,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:42,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:42,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:42,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:42,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:42,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:42,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:42,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:42,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625325606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:42,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:42,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-28 14:55:42,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109648847] [2022-01-28 14:55:42,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:42,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:55:42,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:55:42,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:55:42,414 INFO L87 Difference]: Start difference. First operand 567 states and 1807 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) [2022-01-28 14:55:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:42,667 INFO L93 Difference]: Finished difference Result 854 states and 2643 transitions. [2022-01-28 14:55:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:55:42,667 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 [2022-01-28 14:55:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:42,668 INFO L225 Difference]: With dead ends: 854 [2022-01-28 14:55:42,669 INFO L226 Difference]: Without dead ends: 815 [2022-01-28 14:55:42,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:55:42,669 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:42,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 130 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-01-28 14:55:42,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 571. [2022-01-28 14:55:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.1894736842105265) internal successors, (1818), 570 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1818 transitions. [2022-01-28 14:55:42,683 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1818 transitions. Word has length 21 [2022-01-28 14:55:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:42,683 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 1818 transitions. [2022-01-28 14:55:42,683 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) [2022-01-28 14:55:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1818 transitions. [2022-01-28 14:55:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:42,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:42,684 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:42,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:42,884 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 [2022-01-28 14:55:42,885 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:42,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2117737310, now seen corresponding path program 305 times [2022-01-28 14:55:42,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:42,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103196630] [2022-01-28 14:55:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:42,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:42,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:42,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103196630] [2022-01-28 14:55:42,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103196630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:42,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032384491] [2022-01-28 14:55:42,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:42,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:42,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:42,987 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) [2022-01-28 14:55:42,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-28 14:55:43,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:55:43,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:43,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:43,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:43,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:43,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:43,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:43,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:43,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:43,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:43,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:43,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:43,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032384491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:43,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:43,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:55:43,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986242991] [2022-01-28 14:55:43,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:43,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:43,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:43,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:43,349 INFO L87 Difference]: Start difference. First operand 571 states and 1818 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) [2022-01-28 14:55:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:44,161 INFO L93 Difference]: Finished difference Result 1199 states and 3677 transitions. [2022-01-28 14:55:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:55:44,162 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 [2022-01-28 14:55:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:44,164 INFO L225 Difference]: With dead ends: 1199 [2022-01-28 14:55:44,164 INFO L226 Difference]: Without dead ends: 1180 [2022-01-28 14:55:44,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:55:44,164 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 189 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:44,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 290 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:55:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-01-28 14:55:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 581. [2022-01-28 14:55:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 3.1982758620689653) internal successors, (1855), 580 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 1855 transitions. [2022-01-28 14:55:44,173 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 1855 transitions. Word has length 21 [2022-01-28 14:55:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:44,173 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 1855 transitions. [2022-01-28 14:55:44,173 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) [2022-01-28 14:55:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 1855 transitions. [2022-01-28 14:55:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:44,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:44,174 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:44,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-01-28 14:55:44,374 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 [2022-01-28 14:55:44,374 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:44,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:44,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1179166786, now seen corresponding path program 306 times [2022-01-28 14:55:44,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:44,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98543935] [2022-01-28 14:55:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:44,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:44,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:44,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98543935] [2022-01-28 14:55:44,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98543935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:44,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740597751] [2022-01-28 14:55:44,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:44,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:44,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:44,475 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) [2022-01-28 14:55:44,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-28 14:55:44,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:55:44,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:44,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:44,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:44,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:44,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:44,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:44,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:44,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:44,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:44,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:44,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:44,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:44,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:44,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:44,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740597751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:44,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:44,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:55:44,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612125286] [2022-01-28 14:55:44,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:44,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:44,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:44,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:44,874 INFO L87 Difference]: Start difference. First operand 581 states and 1855 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) [2022-01-28 14:55:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:45,554 INFO L93 Difference]: Finished difference Result 1180 states and 3625 transitions. [2022-01-28 14:55:45,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:55:45,555 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 [2022-01-28 14:55:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:45,557 INFO L225 Difference]: With dead ends: 1180 [2022-01-28 14:55:45,557 INFO L226 Difference]: Without dead ends: 1157 [2022-01-28 14:55:45,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 14:55:45,557 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 181 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:45,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 216 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-28 14:55:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 590. [2022-01-28 14:55:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.2173174872665533) internal successors, (1895), 589 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1895 transitions. [2022-01-28 14:55:45,565 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1895 transitions. Word has length 21 [2022-01-28 14:55:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:45,565 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1895 transitions. [2022-01-28 14:55:45,566 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) [2022-01-28 14:55:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1895 transitions. [2022-01-28 14:55:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:45,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:45,566 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:45,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-01-28 14:55:45,766 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 [2022-01-28 14:55:45,767 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:45,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1197037461, now seen corresponding path program 307 times [2022-01-28 14:55:45,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:45,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283793881] [2022-01-28 14:55:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:45,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:45,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:45,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283793881] [2022-01-28 14:55:45,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283793881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:45,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210203972] [2022-01-28 14:55:45,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:45,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:45,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:45,846 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) [2022-01-28 14:55:45,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-28 14:55:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:45,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:45,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:45,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:45,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:46,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:46,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:46,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:46,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:46,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:46,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:46,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210203972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:46,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:46,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-28 14:55:46,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988840711] [2022-01-28 14:55:46,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:46,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:55:46,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:46,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:55:46,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:55:46,113 INFO L87 Difference]: Start difference. First operand 590 states and 1895 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) [2022-01-28 14:55:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:46,290 INFO L93 Difference]: Finished difference Result 916 states and 2857 transitions. [2022-01-28 14:55:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:46,290 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 [2022-01-28 14:55:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:46,292 INFO L225 Difference]: With dead ends: 916 [2022-01-28 14:55:46,292 INFO L226 Difference]: Without dead ends: 894 [2022-01-28 14:55:46,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:55:46,292 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:46,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 114 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-01-28 14:55:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 593. [2022-01-28 14:55:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.214527027027027) internal successors, (1903), 592 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) [2022-01-28 14:55:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1903 transitions. [2022-01-28 14:55:46,300 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1903 transitions. Word has length 21 [2022-01-28 14:55:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:46,300 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1903 transitions. [2022-01-28 14:55:46,300 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) [2022-01-28 14:55:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1903 transitions. [2022-01-28 14:55:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:46,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:46,301 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:46,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-01-28 14:55:46,501 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 [2022-01-28 14:55:46,501 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:46,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1337997723, now seen corresponding path program 308 times [2022-01-28 14:55:46,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:46,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340107096] [2022-01-28 14:55:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:46,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:46,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:46,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340107096] [2022-01-28 14:55:46,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340107096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:46,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573184452] [2022-01-28 14:55:46,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:46,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:46,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:46,586 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) [2022-01-28 14:55:46,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-28 14:55:46,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:46,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:46,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:46,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:46,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:46,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:46,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:46,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:46,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:46,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:46,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:46,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573184452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:46,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:46,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-28 14:55:46,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429313972] [2022-01-28 14:55:46,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:46,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:55:46,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:46,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:55:46,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:55:46,869 INFO L87 Difference]: Start difference. First operand 593 states and 1903 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) [2022-01-28 14:55:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:47,104 INFO L93 Difference]: Finished difference Result 894 states and 2805 transitions. [2022-01-28 14:55:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:47,104 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 [2022-01-28 14:55:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:47,106 INFO L225 Difference]: With dead ends: 894 [2022-01-28 14:55:47,106 INFO L226 Difference]: Without dead ends: 872 [2022-01-28 14:55:47,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:47,106 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:47,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 150 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-28 14:55:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 596. [2022-01-28 14:55:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.211764705882353) internal successors, (1911), 595 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1911 transitions. [2022-01-28 14:55:47,114 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1911 transitions. Word has length 21 [2022-01-28 14:55:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:47,114 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1911 transitions. [2022-01-28 14:55:47,114 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) [2022-01-28 14:55:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1911 transitions. [2022-01-28 14:55:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:47,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:47,114 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:47,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-01-28 14:55:47,315 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 [2022-01-28 14:55:47,315 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1268495015, now seen corresponding path program 309 times [2022-01-28 14:55:47,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:47,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153978089] [2022-01-28 14:55:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:47,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:47,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:47,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153978089] [2022-01-28 14:55:47,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153978089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:47,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784931692] [2022-01-28 14:55:47,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:47,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:47,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:47,401 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) [2022-01-28 14:55:47,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-28 14:55:47,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:55:47,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:47,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:47,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:47,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:47,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:47,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:47,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:47,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:47,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:47,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:47,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:47,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:47,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:47,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784931692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:47,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:47,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-28 14:55:47,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45393025] [2022-01-28 14:55:47,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:47,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:55:47,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:55:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:55:47,690 INFO L87 Difference]: Start difference. First operand 596 states and 1911 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) [2022-01-28 14:55:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:47,975 INFO L93 Difference]: Finished difference Result 895 states and 2800 transitions. [2022-01-28 14:55:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:55:47,976 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 [2022-01-28 14:55:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:47,977 INFO L225 Difference]: With dead ends: 895 [2022-01-28 14:55:47,977 INFO L226 Difference]: Without dead ends: 866 [2022-01-28 14:55:47,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:47,978 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:47,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 189 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:47,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-01-28 14:55:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 587. [2022-01-28 14:55:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.2064846416382253) internal successors, (1879), 586 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1879 transitions. [2022-01-28 14:55:47,985 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1879 transitions. Word has length 21 [2022-01-28 14:55:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:47,985 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 1879 transitions. [2022-01-28 14:55:47,985 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) [2022-01-28 14:55:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1879 transitions. [2022-01-28 14:55:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:47,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:47,986 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] [2022-01-28 14:55:48,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-01-28 14:55:48,186 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 [2022-01-28 14:55:48,187 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:48,187 INFO L85 PathProgramCache]: Analyzing trace with hash 513973068, now seen corresponding path program 310 times [2022-01-28 14:55:48,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:48,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025856548] [2022-01-28 14:55:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:48,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:48,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:48,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025856548] [2022-01-28 14:55:48,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025856548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:48,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883940658] [2022-01-28 14:55:48,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:48,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:48,304 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) [2022-01-28 14:55:48,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-28 14:55:48,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:48,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:48,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:48,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:48,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:48,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:48,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:48,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:48,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:48,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:48,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:48,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:48,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883940658] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:48,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:48,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-28 14:55:48,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035180401] [2022-01-28 14:55:48,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:48,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:55:48,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:55:48,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:55:48,616 INFO L87 Difference]: Start difference. First operand 587 states and 1879 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) [2022-01-28 14:55:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:49,589 INFO L93 Difference]: Finished difference Result 1056 states and 3231 transitions. [2022-01-28 14:55:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 14:55:49,590 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 [2022-01-28 14:55:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:49,591 INFO L225 Difference]: With dead ends: 1056 [2022-01-28 14:55:49,591 INFO L226 Difference]: Without dead ends: 1033 [2022-01-28 14:55:49,591 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 [2022-01-28 14:55:49,591 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 274 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:49,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 295 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:55:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-01-28 14:55:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 575. [2022-01-28 14:55:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.182926829268293) internal successors, (1827), 574 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1827 transitions. [2022-01-28 14:55:49,599 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1827 transitions. Word has length 21 [2022-01-28 14:55:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:49,599 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1827 transitions. [2022-01-28 14:55:49,599 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) [2022-01-28 14:55:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1827 transitions. [2022-01-28 14:55:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:49,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:49,600 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:49,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-01-28 14:55:49,800 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 [2022-01-28 14:55:49,800 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash 585430622, now seen corresponding path program 311 times [2022-01-28 14:55:49,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:49,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141823845] [2022-01-28 14:55:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:49,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:49,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:49,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141823845] [2022-01-28 14:55:49,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141823845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:49,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061548002] [2022-01-28 14:55:49,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:49,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:49,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:49,897 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) [2022-01-28 14:55:49,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-28 14:55:49,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:55:49,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:49,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:50,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:50,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:50,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:50,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:50,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:50,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:50,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:50,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:50,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061548002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:50,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:50,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:55:50,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338998470] [2022-01-28 14:55:50,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:50,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:50,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:50,239 INFO L87 Difference]: Start difference. First operand 575 states and 1827 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) [2022-01-28 14:55:50,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:50,643 INFO L93 Difference]: Finished difference Result 807 states and 2502 transitions. [2022-01-28 14:55:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:55:50,643 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 [2022-01-28 14:55:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:50,645 INFO L225 Difference]: With dead ends: 807 [2022-01-28 14:55:50,645 INFO L226 Difference]: Without dead ends: 788 [2022-01-28 14:55:50,645 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 [2022-01-28 14:55:50,645 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 84 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:50,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 241 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-28 14:55:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 576. [2022-01-28 14:55:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 3.1913043478260867) internal successors, (1835), 575 states have internal predecessors, (1835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1835 transitions. [2022-01-28 14:55:50,652 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1835 transitions. Word has length 21 [2022-01-28 14:55:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:50,652 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1835 transitions. [2022-01-28 14:55:50,652 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) [2022-01-28 14:55:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1835 transitions. [2022-01-28 14:55:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:50,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:50,653 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] [2022-01-28 14:55:50,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-01-28 14:55:50,853 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 [2022-01-28 14:55:50,853 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:50,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1695628131, now seen corresponding path program 312 times [2022-01-28 14:55:50,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:50,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778158067] [2022-01-28 14:55:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:50,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:50,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:50,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778158067] [2022-01-28 14:55:50,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778158067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:50,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484854204] [2022-01-28 14:55:50,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:50,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:50,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:50,946 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) [2022-01-28 14:55:50,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-28 14:55:50,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:55:50,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:50,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:51,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:51,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:51,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:51,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:51,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:51,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:51,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:51,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:51,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:51,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484854204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:51,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:51,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:55:51,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284408416] [2022-01-28 14:55:51,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:51,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:51,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:51,327 INFO L87 Difference]: Start difference. First operand 576 states and 1835 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) [2022-01-28 14:55:51,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:51,667 INFO L93 Difference]: Finished difference Result 925 states and 2829 transitions. [2022-01-28 14:55:51,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:55:51,668 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 [2022-01-28 14:55:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:51,669 INFO L225 Difference]: With dead ends: 925 [2022-01-28 14:55:51,669 INFO L226 Difference]: Without dead ends: 859 [2022-01-28 14:55:51,669 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 [2022-01-28 14:55:51,669 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 93 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:51,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 201 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:51,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-28 14:55:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 586. [2022-01-28 14:55:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1880341880341883) internal successors, (1865), 585 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1865 transitions. [2022-01-28 14:55:51,676 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1865 transitions. Word has length 21 [2022-01-28 14:55:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:51,677 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1865 transitions. [2022-01-28 14:55:51,677 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) [2022-01-28 14:55:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1865 transitions. [2022-01-28 14:55:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:51,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:51,677 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:51,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-01-28 14:55:51,878 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 [2022-01-28 14:55:51,878 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:51,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1846884373, now seen corresponding path program 313 times [2022-01-28 14:55:51,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:51,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002599211] [2022-01-28 14:55:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:51,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:51,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:51,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002599211] [2022-01-28 14:55:51,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002599211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:51,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347706520] [2022-01-28 14:55:51,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:51,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:51,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:51,960 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) [2022-01-28 14:55:51,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-28 14:55:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:51,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:52,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:52,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:52,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:52,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:52,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:52,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:52,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:52,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:52,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:52,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347706520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:52,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:52,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-28 14:55:52,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860213070] [2022-01-28 14:55:52,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:52,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:55:52,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:52,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:55:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:55:52,259 INFO L87 Difference]: Start difference. First operand 586 states and 1865 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) [2022-01-28 14:55:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:52,502 INFO L93 Difference]: Finished difference Result 745 states and 2311 transitions. [2022-01-28 14:55:52,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:55:52,502 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 [2022-01-28 14:55:52,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:52,503 INFO L225 Difference]: With dead ends: 745 [2022-01-28 14:55:52,503 INFO L226 Difference]: Without dead ends: 701 [2022-01-28 14:55:52,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:55:52,503 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:52,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 174 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-28 14:55:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 586. [2022-01-28 14:55:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1880341880341883) internal successors, (1865), 585 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1865 transitions. [2022-01-28 14:55:52,510 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1865 transitions. Word has length 21 [2022-01-28 14:55:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:52,510 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1865 transitions. [2022-01-28 14:55:52,510 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) [2022-01-28 14:55:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1865 transitions. [2022-01-28 14:55:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:52,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:52,511 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:52,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-01-28 14:55:52,711 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 [2022-01-28 14:55:52,711 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1662028903, now seen corresponding path program 314 times [2022-01-28 14:55:52,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:52,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825800011] [2022-01-28 14:55:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:52,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:52,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:52,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825800011] [2022-01-28 14:55:52,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825800011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:52,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749496781] [2022-01-28 14:55:52,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:52,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:52,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:52,846 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) [2022-01-28 14:55:52,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-28 14:55:52,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:52,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:52,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:52,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:52,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:53,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:53,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:53,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:53,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:53,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:53,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:53,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:53,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749496781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:53,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:53,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:55:53,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633899274] [2022-01-28 14:55:53,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:53,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:53,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:53,232 INFO L87 Difference]: Start difference. First operand 586 states and 1865 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) [2022-01-28 14:55:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:53,801 INFO L93 Difference]: Finished difference Result 970 states and 2932 transitions. [2022-01-28 14:55:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:55:53,801 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 [2022-01-28 14:55:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:53,803 INFO L225 Difference]: With dead ends: 970 [2022-01-28 14:55:53,803 INFO L226 Difference]: Without dead ends: 916 [2022-01-28 14:55:53,803 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 [2022-01-28 14:55:53,803 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:53,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 317 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:55:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-28 14:55:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 596. [2022-01-28 14:55:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.2016806722689077) internal successors, (1905), 595 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) [2022-01-28 14:55:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1905 transitions. [2022-01-28 14:55:53,810 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1905 transitions. Word has length 21 [2022-01-28 14:55:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:53,811 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1905 transitions. [2022-01-28 14:55:53,811 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) [2022-01-28 14:55:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1905 transitions. [2022-01-28 14:55:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:53,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:53,811 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:53,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-01-28 14:55:54,012 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 [2022-01-28 14:55:54,012 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1777381665, now seen corresponding path program 315 times [2022-01-28 14:55:54,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:54,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445248082] [2022-01-28 14:55:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:54,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:54,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:54,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445248082] [2022-01-28 14:55:54,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445248082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:54,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449274755] [2022-01-28 14:55:54,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:55:54,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:54,096 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) [2022-01-28 14:55:54,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-28 14:55:54,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:55:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:54,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:54,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:54,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:54,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:54,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:54,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:54,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:54,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:54,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:54,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:54,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:54,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449274755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:54,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:54,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 16 [2022-01-28 14:55:54,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307405032] [2022-01-28 14:55:54,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:54,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:55:54,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:55:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:55:54,375 INFO L87 Difference]: Start difference. First operand 596 states and 1905 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) [2022-01-28 14:55:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:54,620 INFO L93 Difference]: Finished difference Result 827 states and 2556 transitions. [2022-01-28 14:55:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:55:54,620 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 [2022-01-28 14:55:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:54,622 INFO L225 Difference]: With dead ends: 827 [2022-01-28 14:55:54,622 INFO L226 Difference]: Without dead ends: 769 [2022-01-28 14:55:54,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:55:54,622 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:54,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 171 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:55:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-28 14:55:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 590. [2022-01-28 14:55:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.2020373514431237) internal successors, (1886), 589 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) [2022-01-28 14:55:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1886 transitions. [2022-01-28 14:55:54,629 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1886 transitions. Word has length 21 [2022-01-28 14:55:54,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:54,629 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1886 transitions. [2022-01-28 14:55:54,629 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) [2022-01-28 14:55:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1886 transitions. [2022-01-28 14:55:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:54,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:54,630 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:54,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-01-28 14:55:54,830 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 [2022-01-28 14:55:54,830 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash 444755217, now seen corresponding path program 316 times [2022-01-28 14:55:54,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:54,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489564711] [2022-01-28 14:55:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:54,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:54,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:54,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489564711] [2022-01-28 14:55:54,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489564711] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:54,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698616609] [2022-01-28 14:55:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:55:54,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:54,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:54,952 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) [2022-01-28 14:55:54,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-28 14:55:54,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:55:54,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:54,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:55,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:55,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:55,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:55,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:55,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:55,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:55,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:55,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:55,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:55,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:55,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698616609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:55,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:55,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:55:55,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242804720] [2022-01-28 14:55:55,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:55,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:55:55,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:55:55,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:55,393 INFO L87 Difference]: Start difference. First operand 590 states and 1886 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) [2022-01-28 14:55:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:55,834 INFO L93 Difference]: Finished difference Result 1003 states and 3040 transitions. [2022-01-28 14:55:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:55:55,835 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 [2022-01-28 14:55:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:55,836 INFO L225 Difference]: With dead ends: 1003 [2022-01-28 14:55:55,836 INFO L226 Difference]: Without dead ends: 949 [2022-01-28 14:55:55,836 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 [2022-01-28 14:55:55,837 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 125 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:55,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 220 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-28 14:55:55,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 606. [2022-01-28 14:55:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.231404958677686) internal successors, (1955), 605 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1955 transitions. [2022-01-28 14:55:55,844 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1955 transitions. Word has length 21 [2022-01-28 14:55:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:55,845 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1955 transitions. [2022-01-28 14:55:55,845 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) [2022-01-28 14:55:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1955 transitions. [2022-01-28 14:55:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:55,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:55,845 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:55,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Ended with exit code 0 [2022-01-28 14:55:56,046 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 [2022-01-28 14:55:56,046 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash -410801511, now seen corresponding path program 317 times [2022-01-28 14:55:56,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:56,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772654881] [2022-01-28 14:55:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:56,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:56,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:56,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772654881] [2022-01-28 14:55:56,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772654881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:56,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143994696] [2022-01-28 14:55:56,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:55:56,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:56,126 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) [2022-01-28 14:55:56,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-28 14:55:56,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:55:56,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:56,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:56,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:56,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:56,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:56,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:56,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:56,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:56,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:56,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:56,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:56,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143994696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:56,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:56,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 18 [2022-01-28 14:55:56,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589353064] [2022-01-28 14:55:56,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:56,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:55:56,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:55:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:55:56,427 INFO L87 Difference]: Start difference. First operand 606 states and 1955 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) [2022-01-28 14:55:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:56,726 INFO L93 Difference]: Finished difference Result 775 states and 2420 transitions. [2022-01-28 14:55:56,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:56,727 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 [2022-01-28 14:55:56,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:56,728 INFO L225 Difference]: With dead ends: 775 [2022-01-28 14:55:56,728 INFO L226 Difference]: Without dead ends: 710 [2022-01-28 14:55:56,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:55:56,728 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:56,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 187 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-01-28 14:55:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 602. [2022-01-28 14:55:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.2196339434276204) internal successors, (1935), 601 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1935 transitions. [2022-01-28 14:55:56,735 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1935 transitions. Word has length 21 [2022-01-28 14:55:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:56,735 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1935 transitions. [2022-01-28 14:55:56,735 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) [2022-01-28 14:55:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1935 transitions. [2022-01-28 14:55:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:56,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:56,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:56,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-01-28 14:55:56,936 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 [2022-01-28 14:55:56,936 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash 375252509, now seen corresponding path program 318 times [2022-01-28 14:55:56,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035716871] [2022-01-28 14:55:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:56,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:57,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:57,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035716871] [2022-01-28 14:55:57,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035716871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:57,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5194774] [2022-01-28 14:55:57,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:55:57,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:57,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:57,028 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) [2022-01-28 14:55:57,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-28 14:55:57,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:55:57,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:57,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:57,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:57,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:57,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:57,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:57,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:57,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:57,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:57,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:57,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5194774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:57,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:57,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:55:57,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81897401] [2022-01-28 14:55:57,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:57,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:57,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:57,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:57,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:57,399 INFO L87 Difference]: Start difference. First operand 602 states and 1935 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) [2022-01-28 14:55:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:57,709 INFO L93 Difference]: Finished difference Result 853 states and 2614 transitions. [2022-01-28 14:55:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:55:57,709 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 [2022-01-28 14:55:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:57,710 INFO L225 Difference]: With dead ends: 853 [2022-01-28 14:55:57,711 INFO L226 Difference]: Without dead ends: 811 [2022-01-28 14:55:57,711 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 [2022-01-28 14:55:57,711 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:57,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 184 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-28 14:55:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 598. [2022-01-28 14:55:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.207705192629816) internal successors, (1915), 597 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1915 transitions. [2022-01-28 14:55:57,718 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1915 transitions. Word has length 21 [2022-01-28 14:55:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:57,718 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1915 transitions. [2022-01-28 14:55:57,718 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) [2022-01-28 14:55:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1915 transitions. [2022-01-28 14:55:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:57,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:57,719 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:57,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-01-28 14:55:57,919 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 [2022-01-28 14:55:57,919 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:57,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:57,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1708616946, now seen corresponding path program 319 times [2022-01-28 14:55:57,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:57,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777151422] [2022-01-28 14:55:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:57,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:58,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:58,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777151422] [2022-01-28 14:55:58,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777151422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:58,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177078831] [2022-01-28 14:55:58,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:55:58,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:58,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:58,032 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) [2022-01-28 14:55:58,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-28 14:55:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:58,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:58,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:58,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:58,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:58,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:58,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:55:58,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:58,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:58,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:58,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:58,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:58,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:55:58,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:58,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:55:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:58,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177078831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:58,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:58,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:55:58,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224706831] [2022-01-28 14:55:58,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:58,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:55:58,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:55:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:55:58,513 INFO L87 Difference]: Start difference. First operand 598 states and 1915 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) [2022-01-28 14:55:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:58,747 INFO L93 Difference]: Finished difference Result 871 states and 2709 transitions. [2022-01-28 14:55:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:55:58,748 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 [2022-01-28 14:55:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:58,749 INFO L225 Difference]: With dead ends: 871 [2022-01-28 14:55:58,749 INFO L226 Difference]: Without dead ends: 848 [2022-01-28 14:55:58,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:55:58,749 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 82 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:58,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 253 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 500 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-01-28 14:55:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-28 14:55:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 596. [2022-01-28 14:55:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.2100840336134455) internal successors, (1910), 595 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1910 transitions. [2022-01-28 14:55:58,756 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1910 transitions. Word has length 21 [2022-01-28 14:55:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:58,756 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1910 transitions. [2022-01-28 14:55:58,757 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) [2022-01-28 14:55:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1910 transitions. [2022-01-28 14:55:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:58,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:58,757 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:55:58,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-01-28 14:55:58,957 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 [2022-01-28 14:55:58,958 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:55:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:55:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1326852719, now seen corresponding path program 320 times [2022-01-28 14:55:58,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:55:58,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065543905] [2022-01-28 14:55:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:55:58,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:55:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:55:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:59,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:55:59,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065543905] [2022-01-28 14:55:59,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065543905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:55:59,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415930920] [2022-01-28 14:55:59,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:55:59,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:55:59,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:55:59,081 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) [2022-01-28 14:55:59,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-28 14:55:59,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:55:59,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:55:59,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:55:59,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:55:59,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:55:59,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:55:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:59,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:55:59,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:59,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:59,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:59,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:59,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:55:59,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:55:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:55:59,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415930920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:55:59,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:55:59,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:55:59,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620362414] [2022-01-28 14:55:59,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:55:59,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:55:59,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:55:59,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:55:59,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:55:59,507 INFO L87 Difference]: Start difference. First operand 596 states and 1910 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) [2022-01-28 14:55:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:55:59,878 INFO L93 Difference]: Finished difference Result 904 states and 2757 transitions. [2022-01-28 14:55:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:55:59,878 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 [2022-01-28 14:55:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:55:59,880 INFO L225 Difference]: With dead ends: 904 [2022-01-28 14:55:59,880 INFO L226 Difference]: Without dead ends: 862 [2022-01-28 14:55:59,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:55:59,880 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 110 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:55:59,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 239 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:55:59,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-01-28 14:55:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 594. [2022-01-28 14:55:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.217537942664418) internal successors, (1908), 593 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:55:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1908 transitions. [2022-01-28 14:55:59,887 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1908 transitions. Word has length 21 [2022-01-28 14:55:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:55:59,887 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1908 transitions. [2022-01-28 14:55:59,887 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) [2022-01-28 14:55:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1908 transitions. [2022-01-28 14:55:59,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:55:59,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:55:59,888 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] [2022-01-28 14:55:59,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-01-28 14:56:00,088 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 [2022-01-28 14:56:00,089 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:00,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1935838326, now seen corresponding path program 321 times [2022-01-28 14:56:00,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:00,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013797222] [2022-01-28 14:56:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:00,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:00,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:00,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013797222] [2022-01-28 14:56:00,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013797222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:00,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208714092] [2022-01-28 14:56:00,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:00,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:00,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:00,200 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) [2022-01-28 14:56:00,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-28 14:56:00,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:56:00,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:00,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:00,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:00,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:00,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:00,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:00,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:00,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:00,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:00,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:00,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:00,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:00,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:00,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:00,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:00,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208714092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:00,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:00,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:56:00,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358657085] [2022-01-28 14:56:00,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:00,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:56:00,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:56:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:56:00,623 INFO L87 Difference]: Start difference. First operand 594 states and 1908 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) [2022-01-28 14:56:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:01,101 INFO L93 Difference]: Finished difference Result 1000 states and 3094 transitions. [2022-01-28 14:56:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:56:01,101 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 [2022-01-28 14:56:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:01,103 INFO L225 Difference]: With dead ends: 1000 [2022-01-28 14:56:01,103 INFO L226 Difference]: Without dead ends: 977 [2022-01-28 14:56:01,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:56:01,103 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 109 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:01,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 237 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 717 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2022-01-28 14:56:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-01-28 14:56:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 592. [2022-01-28 14:56:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 3.209813874788494) internal successors, (1897), 591 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1897 transitions. [2022-01-28 14:56:01,111 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1897 transitions. Word has length 21 [2022-01-28 14:56:01,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:01,111 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1897 transitions. [2022-01-28 14:56:01,111 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) [2022-01-28 14:56:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1897 transitions. [2022-01-28 14:56:01,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:01,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:01,112 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] [2022-01-28 14:56:01,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:01,312 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 [2022-01-28 14:56:01,312 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:01,312 INFO L85 PathProgramCache]: Analyzing trace with hash 288324350, now seen corresponding path program 322 times [2022-01-28 14:56:01,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:01,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647006905] [2022-01-28 14:56:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:01,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:01,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647006905] [2022-01-28 14:56:01,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647006905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903357199] [2022-01-28 14:56:01,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:01,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:01,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:01,422 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) [2022-01-28 14:56:01,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-28 14:56:01,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:01,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:01,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:01,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:01,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:01,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:01,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:01,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:01,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:01,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:01,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:01,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:01,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903357199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:01,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:01,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:01,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021993889] [2022-01-28 14:56:01,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:01,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:01,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:01,818 INFO L87 Difference]: Start difference. First operand 592 states and 1897 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) [2022-01-28 14:56:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:02,141 INFO L93 Difference]: Finished difference Result 844 states and 2629 transitions. [2022-01-28 14:56:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:02,141 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 [2022-01-28 14:56:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:02,143 INFO L225 Difference]: With dead ends: 844 [2022-01-28 14:56:02,143 INFO L226 Difference]: Without dead ends: 825 [2022-01-28 14:56:02,143 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 [2022-01-28 14:56:02,143 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:02,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 185 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-01-28 14:56:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 592. [2022-01-28 14:56:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 3.209813874788494) internal successors, (1897), 591 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1897 transitions. [2022-01-28 14:56:02,150 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1897 transitions. Word has length 21 [2022-01-28 14:56:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:02,150 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1897 transitions. [2022-01-28 14:56:02,150 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) [2022-01-28 14:56:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1897 transitions. [2022-01-28 14:56:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:02,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:02,151 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:02,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:02,351 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 [2022-01-28 14:56:02,352 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:02,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1510506498, now seen corresponding path program 323 times [2022-01-28 14:56:02,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:02,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828485597] [2022-01-28 14:56:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:02,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:02,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:02,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828485597] [2022-01-28 14:56:02,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828485597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:02,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055244981] [2022-01-28 14:56:02,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:02,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:02,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:02,490 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) [2022-01-28 14:56:02,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-28 14:56:02,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:56:02,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:02,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:02,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:02,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:02,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:02,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:02,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:02,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:02,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:02,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:02,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:02,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:02,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055244981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:02,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:02,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:02,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66991708] [2022-01-28 14:56:02,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:02,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:02,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:02,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:02,908 INFO L87 Difference]: Start difference. First operand 592 states and 1897 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) [2022-01-28 14:56:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:03,348 INFO L93 Difference]: Finished difference Result 952 states and 2934 transitions. [2022-01-28 14:56:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:56:03,348 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 [2022-01-28 14:56:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:03,349 INFO L225 Difference]: With dead ends: 952 [2022-01-28 14:56:03,349 INFO L226 Difference]: Without dead ends: 929 [2022-01-28 14:56:03,350 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 [2022-01-28 14:56:03,350 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 87 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:03,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 233 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-01-28 14:56:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 606. [2022-01-28 14:56:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.216528925619835) internal successors, (1946), 605 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1946 transitions. [2022-01-28 14:56:03,357 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1946 transitions. Word has length 21 [2022-01-28 14:56:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:03,357 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1946 transitions. [2022-01-28 14:56:03,358 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) [2022-01-28 14:56:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1946 transitions. [2022-01-28 14:56:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:03,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:03,358 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] [2022-01-28 14:56:03,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-01-28 14:56:03,559 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 [2022-01-28 14:56:03,559 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1340346851, now seen corresponding path program 324 times [2022-01-28 14:56:03,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:03,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283690466] [2022-01-28 14:56:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:03,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:03,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283690466] [2022-01-28 14:56:03,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283690466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:03,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347733764] [2022-01-28 14:56:03,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:03,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:03,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:03,660 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) [2022-01-28 14:56:03,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-28 14:56:03,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:56:03,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:03,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:03,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:03,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:03,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:03,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:03,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:04,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:04,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:04,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:04,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:04,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347733764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:04,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:04,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:56:04,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285992482] [2022-01-28 14:56:04,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:04,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:04,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:04,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:04,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:04,073 INFO L87 Difference]: Start difference. First operand 606 states and 1946 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) [2022-01-28 14:56:04,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:04,357 INFO L93 Difference]: Finished difference Result 800 states and 2487 transitions. [2022-01-28 14:56:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:56:04,357 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 [2022-01-28 14:56:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:04,359 INFO L225 Difference]: With dead ends: 800 [2022-01-28 14:56:04,359 INFO L226 Difference]: Without dead ends: 779 [2022-01-28 14:56:04,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:04,359 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 96 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:04,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 174 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:56:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-28 14:56:04,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 602. [2022-01-28 14:56:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.2029950083194674) internal successors, (1925), 601 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1925 transitions. [2022-01-28 14:56:04,366 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1925 transitions. Word has length 21 [2022-01-28 14:56:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1925 transitions. [2022-01-28 14:56:04,366 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) [2022-01-28 14:56:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1925 transitions. [2022-01-28 14:56:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:04,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:04,367 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:04,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-01-28 14:56:04,567 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 [2022-01-28 14:56:04,567 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:04,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1406996344, now seen corresponding path program 325 times [2022-01-28 14:56:04,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:04,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061283764] [2022-01-28 14:56:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:04,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:04,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:04,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061283764] [2022-01-28 14:56:04,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061283764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:04,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971808931] [2022-01-28 14:56:04,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:04,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:04,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:04,683 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) [2022-01-28 14:56:04,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-28 14:56:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:04,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:04,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:04,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:04,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:04,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:04,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:04,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:04,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:05,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:05,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:05,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:05,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:05,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:05,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:05,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971808931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:05,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:05,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:05,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541530241] [2022-01-28 14:56:05,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:05,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:05,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:05,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:05,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:05,150 INFO L87 Difference]: Start difference. First operand 602 states and 1925 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) [2022-01-28 14:56:05,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:05,371 INFO L93 Difference]: Finished difference Result 791 states and 2469 transitions. [2022-01-28 14:56:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:05,372 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 [2022-01-28 14:56:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:05,373 INFO L225 Difference]: With dead ends: 791 [2022-01-28 14:56:05,373 INFO L226 Difference]: Without dead ends: 772 [2022-01-28 14:56:05,373 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 [2022-01-28 14:56:05,373 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:05,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 170 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 422 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-01-28 14:56:05,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-28 14:56:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 599. [2022-01-28 14:56:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1939799331103678) internal successors, (1910), 598 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:05,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1910 transitions. [2022-01-28 14:56:05,380 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1910 transitions. Word has length 21 [2022-01-28 14:56:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:05,380 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1910 transitions. [2022-01-28 14:56:05,380 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) [2022-01-28 14:56:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1910 transitions. [2022-01-28 14:56:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:05,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:05,381 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:05,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-01-28 14:56:05,581 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 [2022-01-28 14:56:05,582 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1364163868, now seen corresponding path program 326 times [2022-01-28 14:56:05,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:05,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808312298] [2022-01-28 14:56:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:05,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:05,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:05,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808312298] [2022-01-28 14:56:05,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808312298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:05,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2451838] [2022-01-28 14:56:05,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:05,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:05,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:05,693 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) [2022-01-28 14:56:05,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-28 14:56:05,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:05,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:05,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:05,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:05,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:05,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:05,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:05,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:05,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:05,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:05,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:06,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:06,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:06,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:06,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:06,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:06,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:06,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2451838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:06,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:06,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:56:06,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462492441] [2022-01-28 14:56:06,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:06,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:06,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:06,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:06,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:06,141 INFO L87 Difference]: Start difference. First operand 599 states and 1910 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) [2022-01-28 14:56:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:06,316 INFO L93 Difference]: Finished difference Result 749 states and 2354 transitions. [2022-01-28 14:56:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:06,316 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 [2022-01-28 14:56:06,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:06,317 INFO L225 Difference]: With dead ends: 749 [2022-01-28 14:56:06,318 INFO L226 Difference]: Without dead ends: 734 [2022-01-28 14:56:06,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:56:06,318 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:06,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 213 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 321 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-01-28 14:56:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-01-28 14:56:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 602. [2022-01-28 14:56:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.196339434276206) internal successors, (1921), 601 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1921 transitions. [2022-01-28 14:56:06,325 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1921 transitions. Word has length 21 [2022-01-28 14:56:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:06,325 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1921 transitions. [2022-01-28 14:56:06,325 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) [2022-01-28 14:56:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1921 transitions. [2022-01-28 14:56:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:06,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:06,326 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:06,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-01-28 14:56:06,526 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 [2022-01-28 14:56:06,526 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1633038960, now seen corresponding path program 327 times [2022-01-28 14:56:06,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:06,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997895446] [2022-01-28 14:56:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:06,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:06,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:06,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997895446] [2022-01-28 14:56:06,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997895446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427150924] [2022-01-28 14:56:06,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:06,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:06,633 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) [2022-01-28 14:56:06,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-28 14:56:06,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:56:06,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:06,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:06,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:06,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:06,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:06,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:07,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:07,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:07,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:07,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:07,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427150924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:07,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:07,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:07,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295384346] [2022-01-28 14:56:07,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:07,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:07,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:07,081 INFO L87 Difference]: Start difference. First operand 602 states and 1921 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) [2022-01-28 14:56:07,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:07,474 INFO L93 Difference]: Finished difference Result 900 states and 2730 transitions. [2022-01-28 14:56:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:56:07,474 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 [2022-01-28 14:56:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:07,476 INFO L225 Difference]: With dead ends: 900 [2022-01-28 14:56:07,476 INFO L226 Difference]: Without dead ends: 881 [2022-01-28 14:56:07,476 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 [2022-01-28 14:56:07,476 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 101 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:07,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 211 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-28 14:56:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 590. [2022-01-28 14:56:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.193548387096774) internal successors, (1881), 589 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1881 transitions. [2022-01-28 14:56:07,483 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1881 transitions. Word has length 21 [2022-01-28 14:56:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:07,483 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1881 transitions. [2022-01-28 14:56:07,483 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) [2022-01-28 14:56:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1881 transitions. [2022-01-28 14:56:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:07,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:07,484 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] [2022-01-28 14:56:07,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-01-28 14:56:07,684 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 [2022-01-28 14:56:07,684 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1778981021, now seen corresponding path program 328 times [2022-01-28 14:56:07,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:07,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943290003] [2022-01-28 14:56:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:07,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:07,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:07,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943290003] [2022-01-28 14:56:07,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943290003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:07,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539472591] [2022-01-28 14:56:07,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:07,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:07,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:07,802 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) [2022-01-28 14:56:07,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-28 14:56:07,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:07,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:07,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:07,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:07,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:08,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:08,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:08,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:08,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:08,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:08,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:08,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:08,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:08,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:08,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:08,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:08,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539472591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:08,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:08,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:08,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779494606] [2022-01-28 14:56:08,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:08,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:08,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:08,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:08,296 INFO L87 Difference]: Start difference. First operand 590 states and 1881 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) [2022-01-28 14:56:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:08,682 INFO L93 Difference]: Finished difference Result 950 states and 2910 transitions. [2022-01-28 14:56:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:56:08,682 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 [2022-01-28 14:56:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:08,683 INFO L225 Difference]: With dead ends: 950 [2022-01-28 14:56:08,683 INFO L226 Difference]: Without dead ends: 890 [2022-01-28 14:56:08,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:56:08,684 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:08,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 224 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 660 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2022-01-28 14:56:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-01-28 14:56:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 592. [2022-01-28 14:56:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 3.191201353637902) internal successors, (1886), 591 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) [2022-01-28 14:56:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1886 transitions. [2022-01-28 14:56:08,691 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1886 transitions. Word has length 21 [2022-01-28 14:56:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:08,691 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1886 transitions. [2022-01-28 14:56:08,691 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) [2022-01-28 14:56:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1886 transitions. [2022-01-28 14:56:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:08,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:08,692 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:08,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:08,892 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 [2022-01-28 14:56:08,892 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash 903792893, now seen corresponding path program 329 times [2022-01-28 14:56:08,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022657620] [2022-01-28 14:56:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:08,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:09,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:09,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022657620] [2022-01-28 14:56:09,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022657620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:09,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140777216] [2022-01-28 14:56:09,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:09,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:09,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:09,015 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) [2022-01-28 14:56:09,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-28 14:56:09,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:56:09,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:09,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:09,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:09,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:09,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:09,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:09,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:09,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:09,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:09,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:09,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:09,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:09,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:09,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:09,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140777216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:09,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:09,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:09,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461700226] [2022-01-28 14:56:09,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:09,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:09,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:09,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:09,546 INFO L87 Difference]: Start difference. First operand 592 states and 1886 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) [2022-01-28 14:56:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:09,975 INFO L93 Difference]: Finished difference Result 884 states and 2741 transitions. [2022-01-28 14:56:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:56:09,975 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 [2022-01-28 14:56:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:09,977 INFO L225 Difference]: With dead ends: 884 [2022-01-28 14:56:09,977 INFO L226 Difference]: Without dead ends: 857 [2022-01-28 14:56:09,977 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 [2022-01-28 14:56:09,977 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:09,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 272 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 701 Invalid, 0 Unknown, 219 Unchecked, 0.3s Time] [2022-01-28 14:56:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-28 14:56:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 594. [2022-01-28 14:56:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.1888701517706575) internal successors, (1891), 593 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:09,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1891 transitions. [2022-01-28 14:56:09,991 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1891 transitions. Word has length 21 [2022-01-28 14:56:09,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:09,992 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1891 transitions. [2022-01-28 14:56:09,992 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) [2022-01-28 14:56:09,992 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1891 transitions. [2022-01-28 14:56:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:09,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:09,992 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] [2022-01-28 14:56:10,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-01-28 14:56:10,193 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 [2022-01-28 14:56:10,193 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash -94270307, now seen corresponding path program 330 times [2022-01-28 14:56:10,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:10,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684504952] [2022-01-28 14:56:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:10,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:10,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:10,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684504952] [2022-01-28 14:56:10,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684504952] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:10,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539587933] [2022-01-28 14:56:10,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:10,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:10,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:10,320 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) [2022-01-28 14:56:10,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-28 14:56:10,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:56:10,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:10,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:10,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:10,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:10,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:10,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:10,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:10,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:10,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:10,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:10,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539587933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:10,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:10,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:10,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505382924] [2022-01-28 14:56:10,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:10,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:10,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:10,770 INFO L87 Difference]: Start difference. First operand 594 states and 1891 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) [2022-01-28 14:56:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:11,156 INFO L93 Difference]: Finished difference Result 814 states and 2534 transitions. [2022-01-28 14:56:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:11,156 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 [2022-01-28 14:56:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:11,157 INFO L225 Difference]: With dead ends: 814 [2022-01-28 14:56:11,157 INFO L226 Difference]: Without dead ends: 793 [2022-01-28 14:56:11,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:56:11,158 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:11,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 207 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-01-28 14:56:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 590. [2022-01-28 14:56:11,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.193548387096774) internal successors, (1881), 589 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1881 transitions. [2022-01-28 14:56:11,165 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1881 transitions. Word has length 21 [2022-01-28 14:56:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:11,165 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1881 transitions. [2022-01-28 14:56:11,165 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) [2022-01-28 14:56:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1881 transitions. [2022-01-28 14:56:11,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:11,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:11,166 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] [2022-01-28 14:56:11,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-01-28 14:56:11,366 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 [2022-01-28 14:56:11,366 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:11,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1630453877, now seen corresponding path program 331 times [2022-01-28 14:56:11,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:11,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908058158] [2022-01-28 14:56:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:11,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:11,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:11,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908058158] [2022-01-28 14:56:11,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908058158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:11,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69860730] [2022-01-28 14:56:11,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:11,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:11,475 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) [2022-01-28 14:56:11,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-28 14:56:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:11,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:11,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:11,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:11,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:11,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:11,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:11,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:11,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:11,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:11,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:11,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:11,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:11,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:11,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69860730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:11,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:11,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:56:11,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315421542] [2022-01-28 14:56:11,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:11,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:11,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:11,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:11,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:11,870 INFO L87 Difference]: Start difference. First operand 590 states and 1881 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) [2022-01-28 14:56:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:12,064 INFO L93 Difference]: Finished difference Result 697 states and 2178 transitions. [2022-01-28 14:56:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:56:12,064 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 [2022-01-28 14:56:12,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:12,065 INFO L225 Difference]: With dead ends: 697 [2022-01-28 14:56:12,065 INFO L226 Difference]: Without dead ends: 653 [2022-01-28 14:56:12,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:12,065 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:12,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 176 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 522 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-01-28 14:56:12,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-28 14:56:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 597. [2022-01-28 14:56:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.197986577181208) internal successors, (1906), 596 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:12,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1906 transitions. [2022-01-28 14:56:12,072 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1906 transitions. Word has length 21 [2022-01-28 14:56:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:12,072 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1906 transitions. [2022-01-28 14:56:12,072 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) [2022-01-28 14:56:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1906 transitions. [2022-01-28 14:56:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:12,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:12,073 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] [2022-01-28 14:56:12,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-01-28 14:56:12,273 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 [2022-01-28 14:56:12,273 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash 632390677, now seen corresponding path program 332 times [2022-01-28 14:56:12,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:12,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921324772] [2022-01-28 14:56:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:12,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:12,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:12,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921324772] [2022-01-28 14:56:12,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921324772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:12,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967932849] [2022-01-28 14:56:12,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:12,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:12,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:12,382 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) [2022-01-28 14:56:12,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-28 14:56:12,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:12,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:12,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:12,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:12,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:12,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:12,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:12,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:12,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:12,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:12,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:12,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:12,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:12,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967932849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:12,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:12,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:56:12,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898440135] [2022-01-28 14:56:12,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:12,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:56:12,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:56:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:56:12,719 INFO L87 Difference]: Start difference. First operand 597 states and 1906 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) [2022-01-28 14:56:12,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:12,905 INFO L93 Difference]: Finished difference Result 667 states and 2106 transitions. [2022-01-28 14:56:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:56:12,905 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 [2022-01-28 14:56:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:12,906 INFO L225 Difference]: With dead ends: 667 [2022-01-28 14:56:12,906 INFO L226 Difference]: Without dead ends: 645 [2022-01-28 14:56:12,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:56:12,906 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:12,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 138 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:56:12,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-28 14:56:12,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 595. [2022-01-28 14:56:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.2003367003367003) internal successors, (1901), 594 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1901 transitions. [2022-01-28 14:56:12,913 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1901 transitions. Word has length 21 [2022-01-28 14:56:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:12,913 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1901 transitions. [2022-01-28 14:56:12,913 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) [2022-01-28 14:56:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1901 transitions. [2022-01-28 14:56:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:12,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:12,914 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] [2022-01-28 14:56:12,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-01-28 14:56:13,115 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 [2022-01-28 14:56:13,115 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1365099207, now seen corresponding path program 333 times [2022-01-28 14:56:13,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:13,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022717936] [2022-01-28 14:56:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:13,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:13,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:13,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022717936] [2022-01-28 14:56:13,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022717936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:13,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422613838] [2022-01-28 14:56:13,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:13,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:13,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:13,224 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) [2022-01-28 14:56:13,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-01-28 14:56:13,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:56:13,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:13,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:13,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:13,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:13,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:13,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:13,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:13,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:13,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:13,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:13,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:13,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:13,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:13,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422613838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:13,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:13,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:56:13,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747516612] [2022-01-28 14:56:13,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:13,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:13,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:13,622 INFO L87 Difference]: Start difference. First operand 595 states and 1901 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) [2022-01-28 14:56:13,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:13,781 INFO L93 Difference]: Finished difference Result 742 states and 2305 transitions. [2022-01-28 14:56:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:13,782 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 [2022-01-28 14:56:13,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:13,783 INFO L225 Difference]: With dead ends: 742 [2022-01-28 14:56:13,783 INFO L226 Difference]: Without dead ends: 698 [2022-01-28 14:56:13,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:13,783 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:13,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 116 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 352 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-01-28 14:56:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-01-28 14:56:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 595. [2022-01-28 14:56:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.2003367003367003) internal successors, (1901), 594 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1901 transitions. [2022-01-28 14:56:13,790 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1901 transitions. Word has length 21 [2022-01-28 14:56:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:13,790 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1901 transitions. [2022-01-28 14:56:13,790 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) [2022-01-28 14:56:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1901 transitions. [2022-01-28 14:56:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:13,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:13,791 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:13,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-01-28 14:56:13,991 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 [2022-01-28 14:56:13,991 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:13,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1885514206, now seen corresponding path program 334 times [2022-01-28 14:56:13,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:13,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822538236] [2022-01-28 14:56:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:13,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:14,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:14,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822538236] [2022-01-28 14:56:14,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822538236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:14,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809581566] [2022-01-28 14:56:14,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:14,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:14,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:14,120 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) [2022-01-28 14:56:14,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-01-28 14:56:14,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:14,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:14,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:14,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:14,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:14,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:14,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:14,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:14,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:14,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:14,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:14,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:14,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:14,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:14,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:14,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809581566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:14,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:14,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:14,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57688575] [2022-01-28 14:56:14,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:14,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:14,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:14,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:14,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:14,664 INFO L87 Difference]: Start difference. First operand 595 states and 1901 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) [2022-01-28 14:56:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:15,138 INFO L93 Difference]: Finished difference Result 919 states and 2841 transitions. [2022-01-28 14:56:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:56:15,138 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 [2022-01-28 14:56:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:15,139 INFO L225 Difference]: With dead ends: 919 [2022-01-28 14:56:15,139 INFO L226 Difference]: Without dead ends: 900 [2022-01-28 14:56:15,139 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 [2022-01-28 14:56:15,140 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:15,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 274 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 704 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2022-01-28 14:56:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-01-28 14:56:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 596. [2022-01-28 14:56:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.2033613445378153) internal successors, (1906), 595 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1906 transitions. [2022-01-28 14:56:15,147 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1906 transitions. Word has length 21 [2022-01-28 14:56:15,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:15,147 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1906 transitions. [2022-01-28 14:56:15,147 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) [2022-01-28 14:56:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1906 transitions. [2022-01-28 14:56:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:15,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:15,148 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] [2022-01-28 14:56:15,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-01-28 14:56:15,348 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 [2022-01-28 14:56:15,348 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:15,349 INFO L85 PathProgramCache]: Analyzing trace with hash -888851367, now seen corresponding path program 335 times [2022-01-28 14:56:15,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:15,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48070717] [2022-01-28 14:56:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:15,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:15,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:15,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48070717] [2022-01-28 14:56:15,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48070717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:15,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056309768] [2022-01-28 14:56:15,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:15,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:15,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:15,471 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) [2022-01-28 14:56:15,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-01-28 14:56:15,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:15,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:15,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:15,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:15,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:15,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:15,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:15,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:15,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:15,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:15,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:15,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:15,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:16,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056309768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:16,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:16,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:16,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180578713] [2022-01-28 14:56:16,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:16,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:16,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:16,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:16,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:16,008 INFO L87 Difference]: Start difference. First operand 596 states and 1906 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) [2022-01-28 14:56:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:16,458 INFO L93 Difference]: Finished difference Result 975 states and 2978 transitions. [2022-01-28 14:56:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:56:16,458 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 [2022-01-28 14:56:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:16,460 INFO L225 Difference]: With dead ends: 975 [2022-01-28 14:56:16,460 INFO L226 Difference]: Without dead ends: 909 [2022-01-28 14:56:16,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:56:16,460 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:16,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 233 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 658 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2022-01-28 14:56:16,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-28 14:56:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 601. [2022-01-28 14:56:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.1983333333333333) internal successors, (1919), 600 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1919 transitions. [2022-01-28 14:56:16,467 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1919 transitions. Word has length 21 [2022-01-28 14:56:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:16,468 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1919 transitions. [2022-01-28 14:56:16,468 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) [2022-01-28 14:56:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1919 transitions. [2022-01-28 14:56:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:16,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:16,468 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] [2022-01-28 14:56:16,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-01-28 14:56:16,669 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 [2022-01-28 14:56:16,669 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash 887451006, now seen corresponding path program 336 times [2022-01-28 14:56:16,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:16,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619358871] [2022-01-28 14:56:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:16,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:16,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:16,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619358871] [2022-01-28 14:56:16,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619358871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:16,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108475002] [2022-01-28 14:56:16,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:16,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:16,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:16,778 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) [2022-01-28 14:56:16,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-01-28 14:56:16,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:56:16,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:16,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:16,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:16,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:16,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:16,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:16,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:17,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:17,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:17,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:17,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:17,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:17,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:17,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:17,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108475002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:17,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:17,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:17,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121189227] [2022-01-28 14:56:17,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:17,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:17,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:17,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:17,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:17,289 INFO L87 Difference]: Start difference. First operand 601 states and 1919 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) [2022-01-28 14:56:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:17,731 INFO L93 Difference]: Finished difference Result 997 states and 3056 transitions. [2022-01-28 14:56:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:56:17,731 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 [2022-01-28 14:56:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:17,733 INFO L225 Difference]: With dead ends: 997 [2022-01-28 14:56:17,733 INFO L226 Difference]: Without dead ends: 955 [2022-01-28 14:56:17,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:56:17,733 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 79 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:17,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 302 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 790 Invalid, 0 Unknown, 228 Unchecked, 0.3s Time] [2022-01-28 14:56:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-28 14:56:17,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 608. [2022-01-28 14:56:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.200988467874794) internal successors, (1943), 607 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1943 transitions. [2022-01-28 14:56:17,741 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1943 transitions. Word has length 21 [2022-01-28 14:56:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:17,741 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1943 transitions. [2022-01-28 14:56:17,741 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) [2022-01-28 14:56:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1943 transitions. [2022-01-28 14:56:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:17,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:17,742 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:17,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-01-28 14:56:17,942 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 [2022-01-28 14:56:17,943 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash 544301355, now seen corresponding path program 337 times [2022-01-28 14:56:17,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:17,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264051881] [2022-01-28 14:56:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:17,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:18,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:18,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264051881] [2022-01-28 14:56:18,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264051881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:18,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472098893] [2022-01-28 14:56:18,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:18,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:18,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:18,051 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) [2022-01-28 14:56:18,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-01-28 14:56:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:18,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:18,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:18,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:18,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:18,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:18,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:18,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:18,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:18,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:18,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:18,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:18,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:18,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:18,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472098893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:18,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:18,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:56:18,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020348785] [2022-01-28 14:56:18,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:18,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:18,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:18,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:18,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:18,464 INFO L87 Difference]: Start difference. First operand 608 states and 1943 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) [2022-01-28 14:56:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:18,623 INFO L93 Difference]: Finished difference Result 781 states and 2423 transitions. [2022-01-28 14:56:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:18,624 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 [2022-01-28 14:56:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:18,625 INFO L225 Difference]: With dead ends: 781 [2022-01-28 14:56:18,625 INFO L226 Difference]: Without dead ends: 737 [2022-01-28 14:56:18,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:18,625 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:18,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 161 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 426 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-01-28 14:56:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-28 14:56:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 608. [2022-01-28 14:56:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.200988467874794) internal successors, (1943), 607 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:18,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1943 transitions. [2022-01-28 14:56:18,632 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1943 transitions. Word has length 21 [2022-01-28 14:56:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:18,632 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1943 transitions. [2022-01-28 14:56:18,632 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) [2022-01-28 14:56:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1943 transitions. [2022-01-28 14:56:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:18,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:18,633 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:18,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-01-28 14:56:18,833 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 [2022-01-28 14:56:18,833 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1110038878, now seen corresponding path program 338 times [2022-01-28 14:56:18,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:18,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068711060] [2022-01-28 14:56:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:18,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:18,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:18,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068711060] [2022-01-28 14:56:18,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068711060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:18,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413901542] [2022-01-28 14:56:18,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:18,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:18,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:18,966 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) [2022-01-28 14:56:18,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-01-28 14:56:18,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:18,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:18,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:18,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:19,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:19,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:19,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:19,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:19,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:19,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:19,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:19,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:19,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:19,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:19,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:19,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:19,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413901542] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:19,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:19,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:19,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707218128] [2022-01-28 14:56:19,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:19,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:19,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:19,471 INFO L87 Difference]: Start difference. First operand 608 states and 1943 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) [2022-01-28 14:56:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:19,953 INFO L93 Difference]: Finished difference Result 897 states and 2750 transitions. [2022-01-28 14:56:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:56:19,953 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 [2022-01-28 14:56:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:19,954 INFO L225 Difference]: With dead ends: 897 [2022-01-28 14:56:19,954 INFO L226 Difference]: Without dead ends: 863 [2022-01-28 14:56:19,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:56:19,955 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 94 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:19,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 300 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 778 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2022-01-28 14:56:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-28 14:56:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 600. [2022-01-28 14:56:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.2036727879799667) internal successors, (1919), 599 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1919 transitions. [2022-01-28 14:56:19,962 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1919 transitions. Word has length 21 [2022-01-28 14:56:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:19,962 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1919 transitions. [2022-01-28 14:56:19,962 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) [2022-01-28 14:56:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1919 transitions. [2022-01-28 14:56:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:19,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:19,963 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:19,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:20,163 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 [2022-01-28 14:56:20,163 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1137573474, now seen corresponding path program 339 times [2022-01-28 14:56:20,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:20,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098553079] [2022-01-28 14:56:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:20,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:20,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:20,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098553079] [2022-01-28 14:56:20,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098553079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:20,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497896798] [2022-01-28 14:56:20,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:20,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:20,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:20,301 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) [2022-01-28 14:56:20,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-01-28 14:56:20,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:56:20,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:20,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:56:20,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:20,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:20,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:20,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:20,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:20,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:20,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:20,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:20,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:20,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:20,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:20,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:20,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:20,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497896798] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:20,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:20,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:20,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658173580] [2022-01-28 14:56:20,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:20,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:20,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:20,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:20,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:20,965 INFO L87 Difference]: Start difference. First operand 600 states and 1919 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) [2022-01-28 14:56:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:21,571 INFO L93 Difference]: Finished difference Result 960 states and 2946 transitions. [2022-01-28 14:56:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:56:21,571 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 [2022-01-28 14:56:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:21,572 INFO L225 Difference]: With dead ends: 960 [2022-01-28 14:56:21,572 INFO L226 Difference]: Without dead ends: 903 [2022-01-28 14:56:21,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:56:21,573 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 109 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:21,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 308 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 724 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2022-01-28 14:56:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-01-28 14:56:21,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 604. [2022-01-28 14:56:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.2155887230514097) internal successors, (1939), 603 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1939 transitions. [2022-01-28 14:56:21,580 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1939 transitions. Word has length 21 [2022-01-28 14:56:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:21,580 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 1939 transitions. [2022-01-28 14:56:21,580 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) [2022-01-28 14:56:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1939 transitions. [2022-01-28 14:56:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:21,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:21,581 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] [2022-01-28 14:56:21,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-01-28 14:56:21,781 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 [2022-01-28 14:56:21,782 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash 550922007, now seen corresponding path program 340 times [2022-01-28 14:56:21,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:21,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598081678] [2022-01-28 14:56:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:21,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:21,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:21,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598081678] [2022-01-28 14:56:21,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598081678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:21,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221365964] [2022-01-28 14:56:21,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:21,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:21,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:21,891 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) [2022-01-28 14:56:21,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-01-28 14:56:21,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:21,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:21,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:21,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:22,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:22,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:22,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:22,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:22,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:22,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:22,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:22,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:22,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:22,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221365964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:22,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:22,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:56:22,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094873313] [2022-01-28 14:56:22,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:22,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:22,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:22,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:22,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:22,327 INFO L87 Difference]: Start difference. First operand 604 states and 1939 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) [2022-01-28 14:56:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:22,466 INFO L93 Difference]: Finished difference Result 716 states and 2244 transitions. [2022-01-28 14:56:22,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:22,466 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 [2022-01-28 14:56:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:22,467 INFO L225 Difference]: With dead ends: 716 [2022-01-28 14:56:22,467 INFO L226 Difference]: Without dead ends: 694 [2022-01-28 14:56:22,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:22,467 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:22,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 154 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-01-28 14:56:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-01-28 14:56:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 599. [2022-01-28 14:56:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.209030100334448) internal successors, (1919), 598 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1919 transitions. [2022-01-28 14:56:22,474 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1919 transitions. Word has length 21 [2022-01-28 14:56:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:22,474 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1919 transitions. [2022-01-28 14:56:22,474 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) [2022-01-28 14:56:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1919 transitions. [2022-01-28 14:56:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:22,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:22,475 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:22,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-01-28 14:56:22,675 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 [2022-01-28 14:56:22,675 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash 67654809, now seen corresponding path program 341 times [2022-01-28 14:56:22,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:22,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404197356] [2022-01-28 14:56:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:22,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:22,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404197356] [2022-01-28 14:56:22,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404197356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701420350] [2022-01-28 14:56:22,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:22,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:22,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:22,806 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) [2022-01-28 14:56:22,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-01-28 14:56:22,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:56:22,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:22,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:22,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:22,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:22,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:22,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:23,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:23,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:23,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:23,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:23,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:23,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:23,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:23,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:23,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:23,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701420350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:23,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:23,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:23,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16605114] [2022-01-28 14:56:23,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:23,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:23,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:23,315 INFO L87 Difference]: Start difference. First operand 599 states and 1919 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) [2022-01-28 14:56:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:23,884 INFO L93 Difference]: Finished difference Result 1029 states and 3116 transitions. [2022-01-28 14:56:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:56:23,884 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 [2022-01-28 14:56:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:23,885 INFO L225 Difference]: With dead ends: 1029 [2022-01-28 14:56:23,885 INFO L226 Difference]: Without dead ends: 975 [2022-01-28 14:56:23,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:56:23,886 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:23,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 234 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 675 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-01-28 14:56:23,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-28 14:56:23,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 606. [2022-01-28 14:56:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.224793388429752) internal successors, (1951), 605 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1951 transitions. [2022-01-28 14:56:23,894 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1951 transitions. Word has length 21 [2022-01-28 14:56:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:23,894 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1951 transitions. [2022-01-28 14:56:23,894 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) [2022-01-28 14:56:23,894 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1951 transitions. [2022-01-28 14:56:23,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:23,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:23,894 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:23,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-01-28 14:56:24,095 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 [2022-01-28 14:56:24,095 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:24,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:24,095 INFO L85 PathProgramCache]: Analyzing trace with hash -787901919, now seen corresponding path program 342 times [2022-01-28 14:56:24,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:24,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919182409] [2022-01-28 14:56:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:24,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:24,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:24,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919182409] [2022-01-28 14:56:24,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919182409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:24,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839788385] [2022-01-28 14:56:24,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:24,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:24,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:24,208 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) [2022-01-28 14:56:24,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-01-28 14:56:24,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:56:24,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:24,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:24,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:24,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:24,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:24,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:24,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:24,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:24,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:24,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:24,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:24,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:24,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:24,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839788385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:24,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:24,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:56:24,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356890469] [2022-01-28 14:56:24,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:56:24,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:56:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:56:24,660 INFO L87 Difference]: Start difference. First operand 606 states and 1951 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) [2022-01-28 14:56:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:24,857 INFO L93 Difference]: Finished difference Result 792 states and 2471 transitions. [2022-01-28 14:56:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:24,858 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 [2022-01-28 14:56:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:24,859 INFO L225 Difference]: With dead ends: 792 [2022-01-28 14:56:24,859 INFO L226 Difference]: Without dead ends: 734 [2022-01-28 14:56:24,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:56:24,859 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:24,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 172 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 510 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-01-28 14:56:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-01-28 14:56:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 600. [2022-01-28 14:56:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.2253756260434057) internal successors, (1932), 599 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:24,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1932 transitions. [2022-01-28 14:56:24,866 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1932 transitions. Word has length 21 [2022-01-28 14:56:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:24,866 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1932 transitions. [2022-01-28 14:56:24,866 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) [2022-01-28 14:56:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1932 transitions. [2022-01-28 14:56:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:24,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:24,867 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:24,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-01-28 14:56:25,067 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 [2022-01-28 14:56:25,067 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:25,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1114672386, now seen corresponding path program 343 times [2022-01-28 14:56:25,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:25,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900762292] [2022-01-28 14:56:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:25,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:25,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:25,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900762292] [2022-01-28 14:56:25,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900762292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:25,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993232467] [2022-01-28 14:56:25,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:25,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:25,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:25,176 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) [2022-01-28 14:56:25,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-01-28 14:56:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:25,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:25,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:25,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:25,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:25,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:25,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:25,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:25,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:25,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:25,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:25,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:25,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:25,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:25,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:25,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993232467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:25,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:25,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:25,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633851474] [2022-01-28 14:56:25,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:25,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:25,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:25,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:25,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:25,627 INFO L87 Difference]: Start difference. First operand 600 states and 1932 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) [2022-01-28 14:56:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:26,110 INFO L93 Difference]: Finished difference Result 940 states and 2923 transitions. [2022-01-28 14:56:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:56:26,111 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 [2022-01-28 14:56:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:26,112 INFO L225 Difference]: With dead ends: 940 [2022-01-28 14:56:26,112 INFO L226 Difference]: Without dead ends: 917 [2022-01-28 14:56:26,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:56:26,112 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:26,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 257 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 792 Invalid, 0 Unknown, 5 Unchecked, 0.3s Time] [2022-01-28 14:56:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-01-28 14:56:26,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 600. [2022-01-28 14:56:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.2253756260434057) internal successors, (1932), 599 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1932 transitions. [2022-01-28 14:56:26,120 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1932 transitions. Word has length 21 [2022-01-28 14:56:26,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:26,120 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1932 transitions. [2022-01-28 14:56:26,120 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) [2022-01-28 14:56:26,120 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1932 transitions. [2022-01-28 14:56:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:26,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:26,121 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] [2022-01-28 14:56:26,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-01-28 14:56:26,330 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 [2022-01-28 14:56:26,330 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -329441561, now seen corresponding path program 344 times [2022-01-28 14:56:26,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:26,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338818329] [2022-01-28 14:56:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:26,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:26,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:26,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338818329] [2022-01-28 14:56:26,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338818329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:26,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641651669] [2022-01-28 14:56:26,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:26,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:26,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:26,480 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) [2022-01-28 14:56:26,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-01-28 14:56:26,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:26,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:26,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:26,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:26,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:26,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:26,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:26,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:26,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:26,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:26,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:26,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:26,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:26,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:26,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:26,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:26,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641651669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:26,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:26,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:26,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727556611] [2022-01-28 14:56:26,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:26,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:26,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:26,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:26,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:26,941 INFO L87 Difference]: Start difference. First operand 600 states and 1932 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) [2022-01-28 14:56:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:27,423 INFO L93 Difference]: Finished difference Result 964 states and 2949 transitions. [2022-01-28 14:56:27,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:56:27,423 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 [2022-01-28 14:56:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:27,424 INFO L225 Difference]: With dead ends: 964 [2022-01-28 14:56:27,424 INFO L226 Difference]: Without dead ends: 943 [2022-01-28 14:56:27,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:56:27,425 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 106 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:27,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 227 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 707 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-01-28 14:56:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-01-28 14:56:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 596. [2022-01-28 14:56:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.211764705882353) internal successors, (1911), 595 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1911 transitions. [2022-01-28 14:56:27,432 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1911 transitions. Word has length 21 [2022-01-28 14:56:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:27,432 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1911 transitions. [2022-01-28 14:56:27,432 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) [2022-01-28 14:56:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1911 transitions. [2022-01-28 14:56:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:27,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:27,433 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] [2022-01-28 14:56:27,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-01-28 14:56:27,633 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 [2022-01-28 14:56:27,634 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:27,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash -642278919, now seen corresponding path program 345 times [2022-01-28 14:56:27,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:27,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159770454] [2022-01-28 14:56:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:27,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:27,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:27,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159770454] [2022-01-28 14:56:27,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159770454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:27,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770851385] [2022-01-28 14:56:27,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:27,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:27,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:27,768 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) [2022-01-28 14:56:27,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-01-28 14:56:27,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:56:27,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:27,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:27,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:27,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:27,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:27,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:28,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:28,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:28,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:28,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:28,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:28,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:28,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:28,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770851385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:28,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:28,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:28,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507683699] [2022-01-28 14:56:28,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:28,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:28,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:28,247 INFO L87 Difference]: Start difference. First operand 596 states and 1911 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) [2022-01-28 14:56:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:28,786 INFO L93 Difference]: Finished difference Result 963 states and 2970 transitions. [2022-01-28 14:56:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:56:28,786 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 [2022-01-28 14:56:28,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:28,788 INFO L225 Difference]: With dead ends: 963 [2022-01-28 14:56:28,788 INFO L226 Difference]: Without dead ends: 936 [2022-01-28 14:56:28,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:56:28,788 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 89 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:28,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 278 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:56:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-01-28 14:56:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 601. [2022-01-28 14:56:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.2133333333333334) internal successors, (1928), 600 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1928 transitions. [2022-01-28 14:56:28,796 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1928 transitions. Word has length 21 [2022-01-28 14:56:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:28,796 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1928 transitions. [2022-01-28 14:56:28,796 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) [2022-01-28 14:56:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1928 transitions. [2022-01-28 14:56:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:28,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:28,796 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] [2022-01-28 14:56:28,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:28,997 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 [2022-01-28 14:56:28,997 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:28,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1640342119, now seen corresponding path program 346 times [2022-01-28 14:56:28,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:28,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361071172] [2022-01-28 14:56:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:28,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:29,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:29,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361071172] [2022-01-28 14:56:29,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361071172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:29,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068455742] [2022-01-28 14:56:29,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:29,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:29,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:29,124 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) [2022-01-28 14:56:29,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-01-28 14:56:29,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:29,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:29,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:29,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:29,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:29,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:29,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:29,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:29,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:29,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:29,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:29,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:29,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:29,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:29,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:29,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068455742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:29,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:29,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:29,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005883970] [2022-01-28 14:56:29,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:29,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:29,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:29,673 INFO L87 Difference]: Start difference. First operand 601 states and 1928 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) [2022-01-28 14:56:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:29,981 INFO L93 Difference]: Finished difference Result 820 states and 2560 transitions. [2022-01-28 14:56:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:56:29,982 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 [2022-01-28 14:56:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:29,983 INFO L225 Difference]: With dead ends: 820 [2022-01-28 14:56:29,983 INFO L226 Difference]: Without dead ends: 799 [2022-01-28 14:56:29,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:56:29,983 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:29,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 213 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 450 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-01-28 14:56:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-28 14:56:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 603. [2022-01-28 14:56:29,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.2142857142857144) internal successors, (1935), 602 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:29,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1935 transitions. [2022-01-28 14:56:29,990 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1935 transitions. Word has length 21 [2022-01-28 14:56:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:29,990 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 1935 transitions. [2022-01-28 14:56:29,990 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) [2022-01-28 14:56:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1935 transitions. [2022-01-28 14:56:29,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:29,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:29,991 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:30,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-01-28 14:56:30,191 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 [2022-01-28 14:56:30,192 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:30,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1877740921, now seen corresponding path program 347 times [2022-01-28 14:56:30,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:30,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778699034] [2022-01-28 14:56:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:30,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:30,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:30,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778699034] [2022-01-28 14:56:30,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778699034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:30,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323895074] [2022-01-28 14:56:30,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:30,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:30,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:30,323 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) [2022-01-28 14:56:30,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-01-28 14:56:30,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:30,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:30,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:30,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:30,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:30,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:30,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:30,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:30,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:30,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:30,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:30,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:30,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:30,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:30,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:30,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323895074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:30,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:30,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:30,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336203401] [2022-01-28 14:56:30,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:30,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:30,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:30,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:30,795 INFO L87 Difference]: Start difference. First operand 603 states and 1935 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) [2022-01-28 14:56:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:31,366 INFO L93 Difference]: Finished difference Result 868 states and 2694 transitions. [2022-01-28 14:56:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:56:31,366 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 [2022-01-28 14:56:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:31,368 INFO L225 Difference]: With dead ends: 868 [2022-01-28 14:56:31,368 INFO L226 Difference]: Without dead ends: 847 [2022-01-28 14:56:31,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:56:31,368 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 81 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:31,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 279 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:56:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-01-28 14:56:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 599. [2022-01-28 14:56:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2157190635451505) internal successors, (1923), 598 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1923 transitions. [2022-01-28 14:56:31,375 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1923 transitions. Word has length 21 [2022-01-28 14:56:31,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:31,375 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1923 transitions. [2022-01-28 14:56:31,375 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) [2022-01-28 14:56:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1923 transitions. [2022-01-28 14:56:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:31,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:31,376 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:31,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-01-28 14:56:31,576 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 [2022-01-28 14:56:31,576 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:31,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1708234529, now seen corresponding path program 348 times [2022-01-28 14:56:31,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:31,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238435753] [2022-01-28 14:56:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:31,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:31,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:31,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238435753] [2022-01-28 14:56:31,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238435753] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:31,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834537162] [2022-01-28 14:56:31,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:31,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:31,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:31,687 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) [2022-01-28 14:56:31,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-01-28 14:56:31,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:56:31,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:31,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:31,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:31,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:31,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:31,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:31,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:31,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:31,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:31,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:31,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:31,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:31,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:32,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834537162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:32,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:32,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:56:32,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656334191] [2022-01-28 14:56:32,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:32,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:56:32,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:56:32,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:56:32,039 INFO L87 Difference]: Start difference. First operand 599 states and 1923 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) [2022-01-28 14:56:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:32,236 INFO L93 Difference]: Finished difference Result 710 states and 2245 transitions. [2022-01-28 14:56:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:56:32,236 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 [2022-01-28 14:56:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:32,237 INFO L225 Difference]: With dead ends: 710 [2022-01-28 14:56:32,237 INFO L226 Difference]: Without dead ends: 688 [2022-01-28 14:56:32,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:56:32,238 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:32,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 157 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:56:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-28 14:56:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 599. [2022-01-28 14:56:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2157190635451505) internal successors, (1923), 598 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1923 transitions. [2022-01-28 14:56:32,245 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1923 transitions. Word has length 21 [2022-01-28 14:56:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:32,245 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1923 transitions. [2022-01-28 14:56:32,245 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) [2022-01-28 14:56:32,245 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1923 transitions. [2022-01-28 14:56:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:32,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:32,246 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] [2022-01-28 14:56:32,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-01-28 14:56:32,446 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 [2022-01-28 14:56:32,446 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:32,446 INFO L85 PathProgramCache]: Analyzing trace with hash 53894296, now seen corresponding path program 349 times [2022-01-28 14:56:32,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:32,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878431291] [2022-01-28 14:56:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:32,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:32,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:32,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878431291] [2022-01-28 14:56:32,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878431291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:32,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037450928] [2022-01-28 14:56:32,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:32,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:32,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:32,607 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) [2022-01-28 14:56:32,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-01-28 14:56:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:32,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:32,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:32,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:32,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:32,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:32,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:32,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:32,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:32,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:32,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:32,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:32,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:32,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:33,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037450928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:33,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:33,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:33,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861001428] [2022-01-28 14:56:33,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:33,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:33,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:33,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:33,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:33,065 INFO L87 Difference]: Start difference. First operand 599 states and 1923 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) [2022-01-28 14:56:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:33,495 INFO L93 Difference]: Finished difference Result 906 states and 2815 transitions. [2022-01-28 14:56:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:56:33,495 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 [2022-01-28 14:56:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:33,497 INFO L225 Difference]: With dead ends: 906 [2022-01-28 14:56:33,497 INFO L226 Difference]: Without dead ends: 883 [2022-01-28 14:56:33,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:56:33,497 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 83 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:33,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 205 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-28 14:56:33,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 599. [2022-01-28 14:56:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2157190635451505) internal successors, (1923), 598 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1923 transitions. [2022-01-28 14:56:33,505 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1923 transitions. Word has length 21 [2022-01-28 14:56:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:33,505 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1923 transitions. [2022-01-28 14:56:33,505 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) [2022-01-28 14:56:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1923 transitions. [2022-01-28 14:56:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:33,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:33,506 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:33,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:33,706 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 [2022-01-28 14:56:33,706 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash 657135293, now seen corresponding path program 350 times [2022-01-28 14:56:33,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:33,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362234285] [2022-01-28 14:56:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:33,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:33,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:33,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362234285] [2022-01-28 14:56:33,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362234285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:33,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646770530] [2022-01-28 14:56:33,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:33,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:33,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:33,833 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) [2022-01-28 14:56:33,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-01-28 14:56:33,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:33,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:33,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:33,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:33,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:33,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:33,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:33,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:33,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:33,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:34,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:34,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:34,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:34,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:34,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:34,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:34,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:34,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646770530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:34,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:34,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:34,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66737662] [2022-01-28 14:56:34,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:34,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:34,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:34,303 INFO L87 Difference]: Start difference. First operand 599 states and 1923 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) [2022-01-28 14:56:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:34,743 INFO L93 Difference]: Finished difference Result 882 states and 2751 transitions. [2022-01-28 14:56:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:56:34,743 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 [2022-01-28 14:56:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:34,744 INFO L225 Difference]: With dead ends: 882 [2022-01-28 14:56:34,745 INFO L226 Difference]: Without dead ends: 855 [2022-01-28 14:56:34,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:56:34,745 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:34,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 215 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 651 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-01-28 14:56:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-01-28 14:56:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 600. [2022-01-28 14:56:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.2203672787979967) internal successors, (1929), 599 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1929 transitions. [2022-01-28 14:56:34,752 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1929 transitions. Word has length 21 [2022-01-28 14:56:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:34,752 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1929 transitions. [2022-01-28 14:56:34,752 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) [2022-01-28 14:56:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1929 transitions. [2022-01-28 14:56:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:34,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:34,753 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:34,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-01-28 14:56:34,953 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 [2022-01-28 14:56:34,953 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1811744683, now seen corresponding path program 351 times [2022-01-28 14:56:34,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:34,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013124616] [2022-01-28 14:56:34,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:34,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:35,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:35,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013124616] [2022-01-28 14:56:35,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013124616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:35,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301529604] [2022-01-28 14:56:35,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:35,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:35,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:35,071 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) [2022-01-28 14:56:35,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-01-28 14:56:35,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:56:35,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:35,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:35,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:35,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:35,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:35,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:35,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:35,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:35,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:35,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:35,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:35,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:35,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:35,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:35,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301529604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:35,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:35,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:56:35,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881486625] [2022-01-28 14:56:35,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:35,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:56:35,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:35,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:56:35,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:56:35,416 INFO L87 Difference]: Start difference. First operand 600 states and 1929 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) [2022-01-28 14:56:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:35,574 INFO L93 Difference]: Finished difference Result 725 states and 2289 transitions. [2022-01-28 14:56:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:56:35,574 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 [2022-01-28 14:56:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:35,575 INFO L225 Difference]: With dead ends: 725 [2022-01-28 14:56:35,575 INFO L226 Difference]: Without dead ends: 696 [2022-01-28 14:56:35,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:56:35,575 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:35,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 119 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:56:35,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-28 14:56:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 597. [2022-01-28 14:56:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.2181208053691277) internal successors, (1918), 596 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1918 transitions. [2022-01-28 14:56:35,587 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1918 transitions. Word has length 21 [2022-01-28 14:56:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:35,587 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1918 transitions. [2022-01-28 14:56:35,588 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) [2022-01-28 14:56:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1918 transitions. [2022-01-28 14:56:35,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:35,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:35,588 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:35,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:35,789 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 [2022-01-28 14:56:35,789 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:35,789 INFO L85 PathProgramCache]: Analyzing trace with hash -817014823, now seen corresponding path program 352 times [2022-01-28 14:56:35,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:35,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240978272] [2022-01-28 14:56:35,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:35,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:35,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240978272] [2022-01-28 14:56:35,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240978272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088754709] [2022-01-28 14:56:35,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:35,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:35,894 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) [2022-01-28 14:56:35,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-01-28 14:56:35,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:35,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:35,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:35,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:35,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:35,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:36,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:36,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:36,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:36,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:36,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:36,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:36,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:36,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:36,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:36,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:36,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:36,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088754709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:36,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:36,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:56:36,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202723809] [2022-01-28 14:56:36,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:36,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:36,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:36,344 INFO L87 Difference]: Start difference. First operand 597 states and 1918 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) [2022-01-28 14:56:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:36,650 INFO L93 Difference]: Finished difference Result 795 states and 2496 transitions. [2022-01-28 14:56:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:36,651 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 [2022-01-28 14:56:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:36,652 INFO L225 Difference]: With dead ends: 795 [2022-01-28 14:56:36,652 INFO L226 Difference]: Without dead ends: 774 [2022-01-28 14:56:36,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:56:36,652 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:36,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 171 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 528 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-01-28 14:56:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-01-28 14:56:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 597. [2022-01-28 14:56:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.2181208053691277) internal successors, (1918), 596 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1918 transitions. [2022-01-28 14:56:36,659 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1918 transitions. Word has length 21 [2022-01-28 14:56:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:36,659 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1918 transitions. [2022-01-28 14:56:36,659 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) [2022-01-28 14:56:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1918 transitions. [2022-01-28 14:56:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:36,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:36,660 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:36,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:36,860 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 [2022-01-28 14:56:36,861 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash 697546365, now seen corresponding path program 353 times [2022-01-28 14:56:36,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:36,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405087462] [2022-01-28 14:56:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:36,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:36,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:36,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405087462] [2022-01-28 14:56:36,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405087462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:36,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940140485] [2022-01-28 14:56:36,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:36,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:36,997 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) [2022-01-28 14:56:36,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-01-28 14:56:37,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:56:37,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:37,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:37,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:37,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:37,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:37,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:37,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:37,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:37,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:37,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:37,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:37,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:37,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:37,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:37,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:37,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940140485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:37,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:37,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:37,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524158593] [2022-01-28 14:56:37,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:37,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:37,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:37,489 INFO L87 Difference]: Start difference. First operand 597 states and 1918 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) [2022-01-28 14:56:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:37,830 INFO L93 Difference]: Finished difference Result 815 states and 2542 transitions. [2022-01-28 14:56:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:37,830 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 [2022-01-28 14:56:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:37,832 INFO L225 Difference]: With dead ends: 815 [2022-01-28 14:56:37,832 INFO L226 Difference]: Without dead ends: 800 [2022-01-28 14:56:37,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:56:37,832 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 94 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:37,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 177 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 529 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-01-28 14:56:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-01-28 14:56:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 593. [2022-01-28 14:56:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.2111486486486487) internal successors, (1901), 592 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1901 transitions. [2022-01-28 14:56:37,839 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1901 transitions. Word has length 21 [2022-01-28 14:56:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:37,839 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1901 transitions. [2022-01-28 14:56:37,839 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) [2022-01-28 14:56:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1901 transitions. [2022-01-28 14:56:37,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:37,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:37,840 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:37,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-01-28 14:56:38,040 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 [2022-01-28 14:56:38,040 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:38,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:38,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1826976089, now seen corresponding path program 354 times [2022-01-28 14:56:38,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:38,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296207372] [2022-01-28 14:56:38,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:38,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:38,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:38,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296207372] [2022-01-28 14:56:38,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296207372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:38,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38397932] [2022-01-28 14:56:38,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:38,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:38,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:38,139 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) [2022-01-28 14:56:38,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-01-28 14:56:38,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:56:38,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:38,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:38,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:38,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:38,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:38,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:38,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:38,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:38,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:38,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:38,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:38,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:56:38,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:38,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:56:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:38,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38397932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:38,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:38,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:38,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898318478] [2022-01-28 14:56:38,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:38,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:38,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:38,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:38,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:38,631 INFO L87 Difference]: Start difference. First operand 593 states and 1901 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) [2022-01-28 14:56:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:38,842 INFO L93 Difference]: Finished difference Result 840 states and 2600 transitions. [2022-01-28 14:56:38,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:38,842 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 [2022-01-28 14:56:38,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:38,843 INFO L225 Difference]: With dead ends: 840 [2022-01-28 14:56:38,843 INFO L226 Difference]: Without dead ends: 774 [2022-01-28 14:56:38,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:38,844 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:38,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 138 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 378 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-01-28 14:56:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-01-28 14:56:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 599. [2022-01-28 14:56:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.202341137123746) internal successors, (1915), 598 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1915 transitions. [2022-01-28 14:56:38,850 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1915 transitions. Word has length 21 [2022-01-28 14:56:38,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:38,850 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1915 transitions. [2022-01-28 14:56:38,850 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) [2022-01-28 14:56:38,850 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1915 transitions. [2022-01-28 14:56:38,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:38,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:38,851 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:38,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-01-28 14:56:39,051 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 [2022-01-28 14:56:39,052 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:39,052 INFO L85 PathProgramCache]: Analyzing trace with hash -50673716, now seen corresponding path program 355 times [2022-01-28 14:56:39,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:39,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943546473] [2022-01-28 14:56:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:39,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:39,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:39,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943546473] [2022-01-28 14:56:39,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943546473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:39,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903627385] [2022-01-28 14:56:39,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:39,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:39,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:39,180 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) [2022-01-28 14:56:39,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-01-28 14:56:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:39,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:39,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:39,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:39,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:39,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:39,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:39,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:39,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:39,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:39,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:39,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:56:39,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:39,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:56:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:39,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903627385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:39,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:39,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:39,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064958309] [2022-01-28 14:56:39,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:39,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:39,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:39,774 INFO L87 Difference]: Start difference. First operand 599 states and 1915 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) [2022-01-28 14:56:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:40,151 INFO L93 Difference]: Finished difference Result 853 states and 2663 transitions. [2022-01-28 14:56:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:56:40,151 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 [2022-01-28 14:56:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:40,152 INFO L225 Difference]: With dead ends: 853 [2022-01-28 14:56:40,152 INFO L226 Difference]: Without dead ends: 830 [2022-01-28 14:56:40,152 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 [2022-01-28 14:56:40,153 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:40,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 288 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 787 Invalid, 0 Unknown, 183 Unchecked, 0.3s Time] [2022-01-28 14:56:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-01-28 14:56:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 597. [2022-01-28 14:56:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.204697986577181) internal successors, (1910), 596 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1910 transitions. [2022-01-28 14:56:40,160 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1910 transitions. Word has length 21 [2022-01-28 14:56:40,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:40,160 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1910 transitions. [2022-01-28 14:56:40,160 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) [2022-01-28 14:56:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1910 transitions. [2022-01-28 14:56:40,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:40,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:40,161 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:40,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:40,361 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 [2022-01-28 14:56:40,361 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash -393823367, now seen corresponding path program 356 times [2022-01-28 14:56:40,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:40,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612997150] [2022-01-28 14:56:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:40,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:40,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:40,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612997150] [2022-01-28 14:56:40,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612997150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:40,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571541553] [2022-01-28 14:56:40,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:40,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:40,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:40,464 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) [2022-01-28 14:56:40,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-01-28 14:56:40,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:40,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:40,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:40,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:40,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:40,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:40,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:40,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:40,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:40,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:40,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:40,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:40,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:40,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:40,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:40,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571541553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:40,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:40,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:56:40,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080383276] [2022-01-28 14:56:40,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:40,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:40,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:40,876 INFO L87 Difference]: Start difference. First operand 597 states and 1910 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) [2022-01-28 14:56:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:41,007 INFO L93 Difference]: Finished difference Result 717 states and 2241 transitions. [2022-01-28 14:56:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:41,007 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 [2022-01-28 14:56:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:41,008 INFO L225 Difference]: With dead ends: 717 [2022-01-28 14:56:41,008 INFO L226 Difference]: Without dead ends: 673 [2022-01-28 14:56:41,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:41,009 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:41,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 127 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 335 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-01-28 14:56:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-28 14:56:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 597. [2022-01-28 14:56:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.204697986577181) internal successors, (1910), 596 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1910 transitions. [2022-01-28 14:56:41,015 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1910 transitions. Word has length 21 [2022-01-28 14:56:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:41,015 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1910 transitions. [2022-01-28 14:56:41,015 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) [2022-01-28 14:56:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1910 transitions. [2022-01-28 14:56:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:41,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:41,016 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:41,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-01-28 14:56:41,216 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 [2022-01-28 14:56:41,216 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:41,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash 975986475, now seen corresponding path program 357 times [2022-01-28 14:56:41,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:41,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053351985] [2022-01-28 14:56:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:41,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:41,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053351985] [2022-01-28 14:56:41,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053351985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502554838] [2022-01-28 14:56:41,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:41,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:41,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:41,338 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) [2022-01-28 14:56:41,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-01-28 14:56:41,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:56:41,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:41,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:41,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:41,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:41,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:41,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:41,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:41,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:41,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:41,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:41,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:41,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:41,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:41,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:41,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502554838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:41,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:41,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:41,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478518959] [2022-01-28 14:56:41,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:41,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:41,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:41,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:41,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:41,851 INFO L87 Difference]: Start difference. First operand 597 states and 1910 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) [2022-01-28 14:56:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:42,211 INFO L93 Difference]: Finished difference Result 869 states and 2694 transitions. [2022-01-28 14:56:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:56:42,211 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 [2022-01-28 14:56:42,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:42,212 INFO L225 Difference]: With dead ends: 869 [2022-01-28 14:56:42,212 INFO L226 Difference]: Without dead ends: 836 [2022-01-28 14:56:42,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:56:42,213 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:42,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 258 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 689 Invalid, 0 Unknown, 161 Unchecked, 0.3s Time] [2022-01-28 14:56:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-28 14:56:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 599. [2022-01-28 14:56:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2040133779264215) internal successors, (1916), 598 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1916 transitions. [2022-01-28 14:56:42,220 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1916 transitions. Word has length 21 [2022-01-28 14:56:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:42,220 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1916 transitions. [2022-01-28 14:56:42,220 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) [2022-01-28 14:56:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1916 transitions. [2022-01-28 14:56:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:42,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:42,221 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:42,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-01-28 14:56:42,421 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 [2022-01-28 14:56:42,421 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:42,421 INFO L85 PathProgramCache]: Analyzing trace with hash -387202715, now seen corresponding path program 358 times [2022-01-28 14:56:42,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:42,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621713841] [2022-01-28 14:56:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:42,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:42,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621713841] [2022-01-28 14:56:42,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621713841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116786851] [2022-01-28 14:56:42,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:42,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:42,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:42,528 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) [2022-01-28 14:56:42,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-01-28 14:56:42,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:42,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:42,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:42,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:42,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:42,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:42,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:42,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:42,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:42,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:42,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:42,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:42,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:42,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:42,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116786851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:42,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:42,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:56:42,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892500138] [2022-01-28 14:56:42,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:42,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:42,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:42,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:42,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:42,961 INFO L87 Difference]: Start difference. First operand 599 states and 1916 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) [2022-01-28 14:56:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:43,136 INFO L93 Difference]: Finished difference Result 712 states and 2228 transitions. [2022-01-28 14:56:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:43,136 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 [2022-01-28 14:56:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:43,137 INFO L225 Difference]: With dead ends: 712 [2022-01-28 14:56:43,137 INFO L226 Difference]: Without dead ends: 690 [2022-01-28 14:56:43,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:43,137 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:43,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 218 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 488 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-01-28 14:56:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-28 14:56:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 597. [2022-01-28 14:56:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.204697986577181) internal successors, (1910), 596 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1910 transitions. [2022-01-28 14:56:43,144 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1910 transitions. Word has length 21 [2022-01-28 14:56:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:43,144 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1910 transitions. [2022-01-28 14:56:43,144 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) [2022-01-28 14:56:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1910 transitions. [2022-01-28 14:56:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:43,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:43,145 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] [2022-01-28 14:56:43,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-01-28 14:56:43,345 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 [2022-01-28 14:56:43,345 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash -904069141, now seen corresponding path program 359 times [2022-01-28 14:56:43,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:43,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239275937] [2022-01-28 14:56:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:43,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:43,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:43,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239275937] [2022-01-28 14:56:43,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239275937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:43,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205248904] [2022-01-28 14:56:43,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:43,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:43,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:43,465 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) [2022-01-28 14:56:43,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-01-28 14:56:43,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:43,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:43,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:43,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:43,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:43,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:43,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:43,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:43,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:43,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:43,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:43,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:43,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:43,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:43,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205248904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:43,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:43,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:43,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618999168] [2022-01-28 14:56:43,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:43,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:43,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:43,974 INFO L87 Difference]: Start difference. First operand 597 states and 1910 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) [2022-01-28 14:56:44,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:44,257 INFO L93 Difference]: Finished difference Result 789 states and 2474 transitions. [2022-01-28 14:56:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:56:44,257 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 [2022-01-28 14:56:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:44,259 INFO L225 Difference]: With dead ends: 789 [2022-01-28 14:56:44,259 INFO L226 Difference]: Without dead ends: 776 [2022-01-28 14:56:44,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:56:44,259 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:44,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 201 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 500 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-01-28 14:56:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-28 14:56:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 598. [2022-01-28 14:56:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.202680067001675) internal successors, (1912), 597 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1912 transitions. [2022-01-28 14:56:44,266 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1912 transitions. Word has length 21 [2022-01-28 14:56:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:44,266 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1912 transitions. [2022-01-28 14:56:44,266 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) [2022-01-28 14:56:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1912 transitions. [2022-01-28 14:56:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:44,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:44,267 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:44,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:44,467 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 [2022-01-28 14:56:44,467 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:44,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1656523933, now seen corresponding path program 360 times [2022-01-28 14:56:44,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:44,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356442543] [2022-01-28 14:56:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:44,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:44,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:44,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356442543] [2022-01-28 14:56:44,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356442543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:44,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085331766] [2022-01-28 14:56:44,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:44,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:44,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:44,579 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) [2022-01-28 14:56:44,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-01-28 14:56:44,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:56:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:44,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:44,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:44,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:44,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:44,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:44,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:44,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:44,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:44,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:44,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:44,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:44,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:45,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085331766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:45,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:45,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:56:45,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289834017] [2022-01-28 14:56:45,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:45,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:45,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:45,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:45,023 INFO L87 Difference]: Start difference. First operand 598 states and 1912 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) [2022-01-28 14:56:45,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:45,187 INFO L93 Difference]: Finished difference Result 697 states and 2175 transitions. [2022-01-28 14:56:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:45,187 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 [2022-01-28 14:56:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:45,188 INFO L225 Difference]: With dead ends: 697 [2022-01-28 14:56:45,188 INFO L226 Difference]: Without dead ends: 687 [2022-01-28 14:56:45,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:45,188 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:45,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 163 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 377 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-01-28 14:56:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-28 14:56:45,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 597. [2022-01-28 14:56:45,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.204697986577181) internal successors, (1910), 596 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:45,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1910 transitions. [2022-01-28 14:56:45,195 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1910 transitions. Word has length 21 [2022-01-28 14:56:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:45,195 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1910 transitions. [2022-01-28 14:56:45,195 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) [2022-01-28 14:56:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1910 transitions. [2022-01-28 14:56:45,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:45,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:45,196 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:45,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-01-28 14:56:45,396 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 [2022-01-28 14:56:45,396 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:45,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:45,397 INFO L85 PathProgramCache]: Analyzing trace with hash -870469913, now seen corresponding path program 361 times [2022-01-28 14:56:45,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:45,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991888621] [2022-01-28 14:56:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:45,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:45,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:45,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991888621] [2022-01-28 14:56:45,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991888621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:45,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166259945] [2022-01-28 14:56:45,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:45,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:45,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:45,506 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) [2022-01-28 14:56:45,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-01-28 14:56:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:45,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:45,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:45,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:45,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:45,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:45,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:45,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:45,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:45,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:45,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:56:45,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:56:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:45,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166259945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:45,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:45,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:45,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935606884] [2022-01-28 14:56:45,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:45,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:45,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:45,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:45,987 INFO L87 Difference]: Start difference. First operand 597 states and 1910 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) [2022-01-28 14:56:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:46,328 INFO L93 Difference]: Finished difference Result 849 states and 2606 transitions. [2022-01-28 14:56:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:56:46,328 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 [2022-01-28 14:56:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:46,329 INFO L225 Difference]: With dead ends: 849 [2022-01-28 14:56:46,329 INFO L226 Difference]: Without dead ends: 795 [2022-01-28 14:56:46,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:56:46,329 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:46,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 204 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 627 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-01-28 14:56:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-28 14:56:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 604. [2022-01-28 14:56:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.2205638474295193) internal successors, (1942), 603 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1942 transitions. [2022-01-28 14:56:46,336 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1942 transitions. Word has length 21 [2022-01-28 14:56:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:46,336 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 1942 transitions. [2022-01-28 14:56:46,336 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) [2022-01-28 14:56:46,336 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1942 transitions. [2022-01-28 14:56:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:46,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:46,337 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] [2022-01-28 14:56:46,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-01-28 14:56:46,537 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 [2022-01-28 14:56:46,537 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:46,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:46,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1726026641, now seen corresponding path program 362 times [2022-01-28 14:56:46,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:46,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122472750] [2022-01-28 14:56:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:46,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:46,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122472750] [2022-01-28 14:56:46,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122472750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923047039] [2022-01-28 14:56:46,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:46,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:46,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:46,658 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) [2022-01-28 14:56:46,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-01-28 14:56:46,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:46,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:46,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:46,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:46,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:46,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:46,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:46,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:47,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:47,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:47,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:47,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:47,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:47,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:47,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923047039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:47,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:47,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:56:47,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685257147] [2022-01-28 14:56:47,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:47,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:47,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:47,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:47,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:47,104 INFO L87 Difference]: Start difference. First operand 604 states and 1942 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) [2022-01-28 14:56:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:47,269 INFO L93 Difference]: Finished difference Result 722 states and 2262 transitions. [2022-01-28 14:56:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:47,269 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 [2022-01-28 14:56:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:47,271 INFO L225 Difference]: With dead ends: 722 [2022-01-28 14:56:47,271 INFO L226 Difference]: Without dead ends: 664 [2022-01-28 14:56:47,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:47,271 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:47,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 139 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 420 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-01-28 14:56:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-28 14:56:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 598. [2022-01-28 14:56:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.221105527638191) internal successors, (1923), 597 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1923 transitions. [2022-01-28 14:56:47,277 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1923 transitions. Word has length 21 [2022-01-28 14:56:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:47,278 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1923 transitions. [2022-01-28 14:56:47,278 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) [2022-01-28 14:56:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1923 transitions. [2022-01-28 14:56:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:47,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:47,278 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:47,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:47,479 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 [2022-01-28 14:56:47,479 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash 176547664, now seen corresponding path program 363 times [2022-01-28 14:56:47,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349391282] [2022-01-28 14:56:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:47,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:47,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:47,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349391282] [2022-01-28 14:56:47,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349391282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:47,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149124578] [2022-01-28 14:56:47,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:47,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:47,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:47,593 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) [2022-01-28 14:56:47,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-01-28 14:56:47,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:56:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:47,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:47,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:47,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:47,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:47,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:47,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:47,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:47,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:47,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:47,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:47,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:47,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:56:47,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:47,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:56:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:48,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149124578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:48,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:48,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:56:48,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93224319] [2022-01-28 14:56:48,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:48,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:48,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:48,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:48,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:48,040 INFO L87 Difference]: Start difference. First operand 598 states and 1923 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) [2022-01-28 14:56:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:48,368 INFO L93 Difference]: Finished difference Result 878 states and 2743 transitions. [2022-01-28 14:56:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:56:48,368 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 [2022-01-28 14:56:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:48,369 INFO L225 Difference]: With dead ends: 878 [2022-01-28 14:56:48,369 INFO L226 Difference]: Without dead ends: 855 [2022-01-28 14:56:48,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:56:48,370 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:48,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 181 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 538 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-28 14:56:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-01-28 14:56:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 598. [2022-01-28 14:56:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.221105527638191) internal successors, (1923), 597 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1923 transitions. [2022-01-28 14:56:48,377 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1923 transitions. Word has length 21 [2022-01-28 14:56:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:48,377 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1923 transitions. [2022-01-28 14:56:48,377 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) [2022-01-28 14:56:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1923 transitions. [2022-01-28 14:56:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:48,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:48,378 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] [2022-01-28 14:56:48,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-01-28 14:56:48,578 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 [2022-01-28 14:56:48,578 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:48,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1267566283, now seen corresponding path program 364 times [2022-01-28 14:56:48,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:48,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320757658] [2022-01-28 14:56:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:48,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:48,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320757658] [2022-01-28 14:56:48,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320757658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494608488] [2022-01-28 14:56:48,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:48,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:48,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:48,720 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) [2022-01-28 14:56:48,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-01-28 14:56:48,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:48,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:48,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:48,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:48,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:48,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:48,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:48,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:49,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:49,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:49,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:49,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:49,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:49,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:49,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494608488] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:49,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:49,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:49,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133963753] [2022-01-28 14:56:49,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:49,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:49,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:49,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:49,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:49,166 INFO L87 Difference]: Start difference. First operand 598 states and 1923 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) [2022-01-28 14:56:49,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:49,495 INFO L93 Difference]: Finished difference Result 786 states and 2430 transitions. [2022-01-28 14:56:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:49,495 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 [2022-01-28 14:56:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:49,497 INFO L225 Difference]: With dead ends: 786 [2022-01-28 14:56:49,497 INFO L226 Difference]: Without dead ends: 765 [2022-01-28 14:56:49,497 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 [2022-01-28 14:56:49,497 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:49,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 214 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 643 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2022-01-28 14:56:49,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-28 14:56:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 593. [2022-01-28 14:56:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.204391891891892) internal successors, (1897), 592 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1897 transitions. [2022-01-28 14:56:49,504 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1897 transitions. Word has length 21 [2022-01-28 14:56:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:49,504 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1897 transitions. [2022-01-28 14:56:49,504 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) [2022-01-28 14:56:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1897 transitions. [2022-01-28 14:56:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:49,504 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:49,504 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] [2022-01-28 14:56:49,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-01-28 14:56:49,705 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 [2022-01-28 14:56:49,705 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:49,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1470966312, now seen corresponding path program 365 times [2022-01-28 14:56:49,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:49,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127945626] [2022-01-28 14:56:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:49,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:49,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:49,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127945626] [2022-01-28 14:56:49,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127945626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:49,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971177904] [2022-01-28 14:56:49,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:49,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:49,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:49,829 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) [2022-01-28 14:56:49,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-01-28 14:56:49,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:56:49,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:49,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:49,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:49,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:49,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:49,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:49,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:50,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:50,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:50,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:50,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:50,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:56:50,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:50,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:56:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:50,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971177904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:50,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:50,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:50,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045695834] [2022-01-28 14:56:50,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:50,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:50,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:50,261 INFO L87 Difference]: Start difference. First operand 593 states and 1897 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) [2022-01-28 14:56:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:50,514 INFO L93 Difference]: Finished difference Result 717 states and 2257 transitions. [2022-01-28 14:56:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:50,515 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 [2022-01-28 14:56:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:50,516 INFO L225 Difference]: With dead ends: 717 [2022-01-28 14:56:50,516 INFO L226 Difference]: Without dead ends: 698 [2022-01-28 14:56:50,516 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 [2022-01-28 14:56:50,516 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:50,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 162 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:56:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-01-28 14:56:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 589. [2022-01-28 14:56:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.20578231292517) internal successors, (1885), 588 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1885 transitions. [2022-01-28 14:56:50,522 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1885 transitions. Word has length 21 [2022-01-28 14:56:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:50,522 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1885 transitions. [2022-01-28 14:56:50,522 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) [2022-01-28 14:56:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1885 transitions. [2022-01-28 14:56:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:50,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:50,523 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:50,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-01-28 14:56:50,723 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 [2022-01-28 14:56:50,724 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash -175604623, now seen corresponding path program 366 times [2022-01-28 14:56:50,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261882652] [2022-01-28 14:56:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:50,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:50,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261882652] [2022-01-28 14:56:50,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261882652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991628434] [2022-01-28 14:56:50,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:50,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:50,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:50,842 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) [2022-01-28 14:56:50,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-01-28 14:56:50,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:56:50,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:50,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:50,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:50,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:50,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:51,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:51,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:51,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:51,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:51,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:51,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:51,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:51,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:51,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:51,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:51,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991628434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:51,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:51,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:51,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437503004] [2022-01-28 14:56:51,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:51,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:51,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:51,352 INFO L87 Difference]: Start difference. First operand 589 states and 1885 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) [2022-01-28 14:56:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:51,784 INFO L93 Difference]: Finished difference Result 990 states and 2998 transitions. [2022-01-28 14:56:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:56:51,784 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 [2022-01-28 14:56:51,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:51,785 INFO L225 Difference]: With dead ends: 990 [2022-01-28 14:56:51,785 INFO L226 Difference]: Without dead ends: 936 [2022-01-28 14:56:51,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:56:51,786 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:51,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 222 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-01-28 14:56:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 611. [2022-01-28 14:56:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 3.2459016393442623) internal successors, (1980), 610 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1980 transitions. [2022-01-28 14:56:51,793 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1980 transitions. Word has length 21 [2022-01-28 14:56:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:51,794 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1980 transitions. [2022-01-28 14:56:51,794 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) [2022-01-28 14:56:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1980 transitions. [2022-01-28 14:56:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:51,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:51,794 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] [2022-01-28 14:56:51,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-01-28 14:56:51,995 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 [2022-01-28 14:56:51,995 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1031161351, now seen corresponding path program 367 times [2022-01-28 14:56:51,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:51,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813859178] [2022-01-28 14:56:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:51,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:52,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:52,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813859178] [2022-01-28 14:56:52,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813859178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:52,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940167938] [2022-01-28 14:56:52,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:52,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:52,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:52,099 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) [2022-01-28 14:56:52,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-01-28 14:56:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:52,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:52,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:52,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:52,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:52,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:52,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:52,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:52,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:52,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:52,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:52,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:52,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:52,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:56:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:52,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940167938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:52,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:52,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:56:52,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729382561] [2022-01-28 14:56:52,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:52,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:56:52,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:52,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:56:52,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:52,472 INFO L87 Difference]: Start difference. First operand 611 states and 1980 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) [2022-01-28 14:56:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:52,695 INFO L93 Difference]: Finished difference Result 742 states and 2329 transitions. [2022-01-28 14:56:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:52,695 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 [2022-01-28 14:56:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:52,696 INFO L225 Difference]: With dead ends: 742 [2022-01-28 14:56:52,696 INFO L226 Difference]: Without dead ends: 670 [2022-01-28 14:56:52,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:56:52,697 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:52,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 167 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:56:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-28 14:56:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 605. [2022-01-28 14:56:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.236754966887417) internal successors, (1955), 604 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1955 transitions. [2022-01-28 14:56:52,703 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1955 transitions. Word has length 21 [2022-01-28 14:56:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:52,703 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 1955 transitions. [2022-01-28 14:56:52,703 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) [2022-01-28 14:56:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1955 transitions. [2022-01-28 14:56:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:52,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:52,704 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:52,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:52,904 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 [2022-01-28 14:56:52,904 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:52,905 INFO L85 PathProgramCache]: Analyzing trace with hash -245107331, now seen corresponding path program 368 times [2022-01-28 14:56:52,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:52,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173871372] [2022-01-28 14:56:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:52,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:53,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:53,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173871372] [2022-01-28 14:56:53,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173871372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:53,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159964226] [2022-01-28 14:56:53,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:53,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:53,017 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) [2022-01-28 14:56:53,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-01-28 14:56:53,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:53,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:53,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:53,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:53,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:53,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:53,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:53,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:53,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:53,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:53,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:53,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:53,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:53,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:53,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:53,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159964226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:53,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:53,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:53,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719646891] [2022-01-28 14:56:53,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:53,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:53,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:53,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:53,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:53,469 INFO L87 Difference]: Start difference. First operand 605 states and 1955 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) [2022-01-28 14:56:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:53,806 INFO L93 Difference]: Finished difference Result 837 states and 2575 transitions. [2022-01-28 14:56:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:56:53,806 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 [2022-01-28 14:56:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:53,807 INFO L225 Difference]: With dead ends: 837 [2022-01-28 14:56:53,807 INFO L226 Difference]: Without dead ends: 795 [2022-01-28 14:56:53,807 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 [2022-01-28 14:56:53,807 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:53,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 221 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-28 14:56:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 594. [2022-01-28 14:56:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.2225969645868466) internal successors, (1911), 593 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1911 transitions. [2022-01-28 14:56:53,814 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1911 transitions. Word has length 21 [2022-01-28 14:56:53,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:53,814 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1911 transitions. [2022-01-28 14:56:53,814 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) [2022-01-28 14:56:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1911 transitions. [2022-01-28 14:56:53,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:53,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:53,815 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:53,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-01-28 14:56:54,015 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 [2022-01-28 14:56:54,016 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1025170136, now seen corresponding path program 369 times [2022-01-28 14:56:54,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:54,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679051731] [2022-01-28 14:56:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:54,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:54,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679051731] [2022-01-28 14:56:54,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679051731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120670458] [2022-01-28 14:56:54,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:56:54,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:54,151 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) [2022-01-28 14:56:54,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-01-28 14:56:54,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:56:54,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:54,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:54,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:54,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:54,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:54,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:54,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:54,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:54,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:54,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:54,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:54,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:56:54,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:54,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:56:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:54,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120670458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:54,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:54,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:54,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573470803] [2022-01-28 14:56:54,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:54,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:54,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:54,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:54,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:54,592 INFO L87 Difference]: Start difference. First operand 594 states and 1911 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) [2022-01-28 14:56:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:54,952 INFO L93 Difference]: Finished difference Result 883 states and 2745 transitions. [2022-01-28 14:56:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:54,952 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 [2022-01-28 14:56:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:54,954 INFO L225 Difference]: With dead ends: 883 [2022-01-28 14:56:54,954 INFO L226 Difference]: Without dead ends: 860 [2022-01-28 14:56:54,954 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 [2022-01-28 14:56:54,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:54,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 196 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-01-28 14:56:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 608. [2022-01-28 14:56:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.228995057660626) internal successors, (1960), 607 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1960 transitions. [2022-01-28 14:56:54,961 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1960 transitions. Word has length 21 [2022-01-28 14:56:54,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:54,961 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1960 transitions. [2022-01-28 14:56:54,962 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) [2022-01-28 14:56:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1960 transitions. [2022-01-28 14:56:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:54,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:54,962 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] [2022-01-28 14:56:54,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2022-01-28 14:56:55,162 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 [2022-01-28 14:56:55,163 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash -418943811, now seen corresponding path program 370 times [2022-01-28 14:56:55,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:55,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764961019] [2022-01-28 14:56:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:55,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:55,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764961019] [2022-01-28 14:56:55,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764961019] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:55,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986455719] [2022-01-28 14:56:55,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:56:55,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:55,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:55,272 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) [2022-01-28 14:56:55,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-01-28 14:56:55,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:56:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:55,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:55,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:55,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:55,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:55,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:55,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:55,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:55,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:55,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:56:55,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:55,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:56:55,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:55,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:56:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:55,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986455719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:55,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:55,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:56:55,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497662044] [2022-01-28 14:56:55,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:55,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:56:55,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:55,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:56:55,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:56:55,721 INFO L87 Difference]: Start difference. First operand 608 states and 1960 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) [2022-01-28 14:56:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:55,992 INFO L93 Difference]: Finished difference Result 726 states and 2281 transitions. [2022-01-28 14:56:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:56:55,992 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 [2022-01-28 14:56:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:55,993 INFO L225 Difference]: With dead ends: 726 [2022-01-28 14:56:55,993 INFO L226 Difference]: Without dead ends: 705 [2022-01-28 14:56:55,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:56:55,993 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:55,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 197 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 606 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-01-28 14:56:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-01-28 14:56:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 604. [2022-01-28 14:56:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.2155887230514097) internal successors, (1939), 603 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:56,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1939 transitions. [2022-01-28 14:56:56,000 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1939 transitions. Word has length 21 [2022-01-28 14:56:56,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:56,000 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 1939 transitions. [2022-01-28 14:56:56,000 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) [2022-01-28 14:56:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1939 transitions. [2022-01-28 14:56:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:56,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:56,001 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:56,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:56,201 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 [2022-01-28 14:56:56,201 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:56,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1128680290, now seen corresponding path program 371 times [2022-01-28 14:56:56,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:56,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029214193] [2022-01-28 14:56:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:56,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:56,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:56,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029214193] [2022-01-28 14:56:56,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029214193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:56,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329363201] [2022-01-28 14:56:56,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:56:56,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:56,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:56,327 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) [2022-01-28 14:56:56,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-01-28 14:56:56,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:56:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:56,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:56,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:56,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:56,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:56,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:56,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:56,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:56,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:56,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:56:56,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:56,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:56:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:56,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329363201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:56,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:56,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:56,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447197967] [2022-01-28 14:56:56,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:56,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:56,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:56,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:56,757 INFO L87 Difference]: Start difference. First operand 604 states and 1939 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) [2022-01-28 14:56:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:57,131 INFO L93 Difference]: Finished difference Result 773 states and 2417 transitions. [2022-01-28 14:56:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:57,131 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 [2022-01-28 14:56:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:57,132 INFO L225 Difference]: With dead ends: 773 [2022-01-28 14:56:57,132 INFO L226 Difference]: Without dead ends: 754 [2022-01-28 14:56:57,132 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 [2022-01-28 14:56:57,132 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:57,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 247 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:56:57,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-28 14:56:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 590. [2022-01-28 14:56:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.2088285229202036) internal successors, (1890), 589 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1890 transitions. [2022-01-28 14:56:57,139 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1890 transitions. Word has length 21 [2022-01-28 14:56:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:57,139 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1890 transitions. [2022-01-28 14:56:57,139 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) [2022-01-28 14:56:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1890 transitions. [2022-01-28 14:56:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:57,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:57,142 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:57,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-01-28 14:56:57,342 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 [2022-01-28 14:56:57,342 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:57,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1334025299, now seen corresponding path program 372 times [2022-01-28 14:56:57,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:57,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338699077] [2022-01-28 14:56:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:57,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:57,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338699077] [2022-01-28 14:56:57,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338699077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:57,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056905946] [2022-01-28 14:56:57,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:56:57,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:57,470 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) [2022-01-28 14:56:57,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-01-28 14:56:57,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:56:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:57,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:57,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:57,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:57,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:57,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:56:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:57,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:57,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:57,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:57,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:57,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:57,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:57,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:57,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056905946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:57,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:57,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:57,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588288247] [2022-01-28 14:56:57,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:57,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:57,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:57,940 INFO L87 Difference]: Start difference. First operand 590 states and 1890 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) [2022-01-28 14:56:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:58,232 INFO L93 Difference]: Finished difference Result 826 states and 2541 transitions. [2022-01-28 14:56:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:56:58,234 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 [2022-01-28 14:56:58,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:58,235 INFO L225 Difference]: With dead ends: 826 [2022-01-28 14:56:58,235 INFO L226 Difference]: Without dead ends: 805 [2022-01-28 14:56:58,235 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 [2022-01-28 14:56:58,236 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:58,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 194 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:56:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-01-28 14:56:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 585. [2022-01-28 14:56:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.2071917808219177) internal successors, (1873), 584 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1873 transitions. [2022-01-28 14:56:58,245 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1873 transitions. Word has length 21 [2022-01-28 14:56:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:58,245 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 1873 transitions. [2022-01-28 14:56:58,245 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) [2022-01-28 14:56:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1873 transitions. [2022-01-28 14:56:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:58,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:58,246 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] [2022-01-28 14:56:58,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:58,446 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 [2022-01-28 14:56:58,446 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash -708027060, now seen corresponding path program 373 times [2022-01-28 14:56:58,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:58,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887573494] [2022-01-28 14:56:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:58,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:58,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:58,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887573494] [2022-01-28 14:56:58,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887573494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:58,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100898376] [2022-01-28 14:56:58,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:56:58,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:58,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:58,569 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) [2022-01-28 14:56:58,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-01-28 14:56:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:58,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:58,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:58,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:58,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:58,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:58,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:58,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:58,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:58,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:56:58,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:58,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:58,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:58,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:59,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:56:59,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:59,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100898376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:56:59,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:56:59,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:56:59,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765633399] [2022-01-28 14:56:59,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:56:59,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:56:59,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:56:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:56:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:56:59,049 INFO L87 Difference]: Start difference. First operand 585 states and 1873 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) [2022-01-28 14:56:59,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:56:59,364 INFO L93 Difference]: Finished difference Result 775 states and 2429 transitions. [2022-01-28 14:56:59,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:56:59,364 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 [2022-01-28 14:56:59,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:56:59,365 INFO L225 Difference]: With dead ends: 775 [2022-01-28 14:56:59,365 INFO L226 Difference]: Without dead ends: 748 [2022-01-28 14:56:59,365 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 [2022-01-28 14:56:59,365 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:56:59,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 207 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 676 Invalid, 0 Unknown, 59 Unchecked, 0.3s Time] [2022-01-28 14:56:59,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-01-28 14:56:59,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 593. [2022-01-28 14:56:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.20777027027027) internal successors, (1899), 592 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:56:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1899 transitions. [2022-01-28 14:56:59,372 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1899 transitions. Word has length 21 [2022-01-28 14:56:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:56:59,372 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1899 transitions. [2022-01-28 14:56:59,372 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) [2022-01-28 14:56:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1899 transitions. [2022-01-28 14:56:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:56:59,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:56:59,373 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:56:59,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Forceful destruction successful, exit code 0 [2022-01-28 14:56:59,573 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 [2022-01-28 14:56:59,574 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:56:59,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:56:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash -104786063, now seen corresponding path program 374 times [2022-01-28 14:56:59,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:56:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482798057] [2022-01-28 14:56:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:56:59,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:56:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:56:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:59,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:56:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482798057] [2022-01-28 14:56:59,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482798057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:56:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549023789] [2022-01-28 14:56:59,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:56:59,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:56:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:56:59,699 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) [2022-01-28 14:56:59,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-01-28 14:56:59,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:56:59,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:56:59,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:56:59,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:56:59,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:59,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:56:59,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:59,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:59,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:56:59,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:56:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:56:59,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:00,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:00,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:00,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:00,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:00,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:00,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:00,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549023789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:00,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:00,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:00,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857229532] [2022-01-28 14:57:00,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:00,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:00,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:00,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:00,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:00,222 INFO L87 Difference]: Start difference. First operand 593 states and 1899 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) [2022-01-28 14:57:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:00,716 INFO L93 Difference]: Finished difference Result 899 states and 2790 transitions. [2022-01-28 14:57:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:57:00,716 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 [2022-01-28 14:57:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:00,717 INFO L225 Difference]: With dead ends: 899 [2022-01-28 14:57:00,717 INFO L226 Difference]: Without dead ends: 872 [2022-01-28 14:57:00,717 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 [2022-01-28 14:57:00,717 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:00,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 296 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 917 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-01-28 14:57:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-28 14:57:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 597. [2022-01-28 14:57:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.2130872483221475) internal successors, (1915), 596 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1915 transitions. [2022-01-28 14:57:00,731 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1915 transitions. Word has length 21 [2022-01-28 14:57:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:00,731 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1915 transitions. [2022-01-28 14:57:00,731 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) [2022-01-28 14:57:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1915 transitions. [2022-01-28 14:57:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:00,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:00,732 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] [2022-01-28 14:57:00,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Ended with exit code 0 [2022-01-28 14:57:00,932 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 [2022-01-28 14:57:00,933 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:00,933 INFO L85 PathProgramCache]: Analyzing trace with hash 703271860, now seen corresponding path program 375 times [2022-01-28 14:57:00,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:00,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247277224] [2022-01-28 14:57:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:00,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:01,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247277224] [2022-01-28 14:57:01,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247277224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686575509] [2022-01-28 14:57:01,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:01,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:01,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:01,048 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) [2022-01-28 14:57:01,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-01-28 14:57:01,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:01,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:01,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:01,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:01,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:01,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:01,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:01,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:01,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:01,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:01,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:01,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:01,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:01,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:01,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:01,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:01,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:01,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686575509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:01,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:01,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:01,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058727615] [2022-01-28 14:57:01,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:01,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:01,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:01,528 INFO L87 Difference]: Start difference. First operand 597 states and 1915 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) [2022-01-28 14:57:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:01,931 INFO L93 Difference]: Finished difference Result 848 states and 2636 transitions. [2022-01-28 14:57:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:57:01,931 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 [2022-01-28 14:57:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:01,933 INFO L225 Difference]: With dead ends: 848 [2022-01-28 14:57:01,933 INFO L226 Difference]: Without dead ends: 821 [2022-01-28 14:57:01,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:57:01,933 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:01,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 286 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 741 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2022-01-28 14:57:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-28 14:57:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 597. [2022-01-28 14:57:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.209731543624161) internal successors, (1913), 596 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1913 transitions. [2022-01-28 14:57:01,940 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1913 transitions. Word has length 21 [2022-01-28 14:57:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:01,941 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1913 transitions. [2022-01-28 14:57:01,941 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) [2022-01-28 14:57:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1913 transitions. [2022-01-28 14:57:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:01,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:01,941 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:01,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Ended with exit code 0 [2022-01-28 14:57:02,142 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 [2022-01-28 14:57:02,142 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:02,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1102849263, now seen corresponding path program 376 times [2022-01-28 14:57:02,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:02,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424442447] [2022-01-28 14:57:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:02,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:02,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424442447] [2022-01-28 14:57:02,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424442447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396918224] [2022-01-28 14:57:02,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:02,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:02,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:02,267 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) [2022-01-28 14:57:02,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-01-28 14:57:02,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:02,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:02,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:02,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:02,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:02,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:02,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:02,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:02,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:02,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:02,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:02,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:02,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:02,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:02,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:02,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:02,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396918224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:02,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:02,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:02,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061770863] [2022-01-28 14:57:02,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:02,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:02,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:02,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:02,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:02,796 INFO L87 Difference]: Start difference. First operand 597 states and 1913 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) [2022-01-28 14:57:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:03,142 INFO L93 Difference]: Finished difference Result 825 states and 2573 transitions. [2022-01-28 14:57:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:03,143 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 [2022-01-28 14:57:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:03,144 INFO L225 Difference]: With dead ends: 825 [2022-01-28 14:57:03,144 INFO L226 Difference]: Without dead ends: 804 [2022-01-28 14:57:03,144 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 [2022-01-28 14:57:03,144 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:03,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 207 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 544 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-01-28 14:57:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-28 14:57:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 595. [2022-01-28 14:57:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.212121212121212) internal successors, (1908), 594 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1908 transitions. [2022-01-28 14:57:03,151 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1908 transitions. Word has length 21 [2022-01-28 14:57:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:03,151 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1908 transitions. [2022-01-28 14:57:03,151 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) [2022-01-28 14:57:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1908 transitions. [2022-01-28 14:57:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:03,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:03,152 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] [2022-01-28 14:57:03,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-01-28 14:57:03,352 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 [2022-01-28 14:57:03,352 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:03,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2049239911, now seen corresponding path program 377 times [2022-01-28 14:57:03,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:03,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306016483] [2022-01-28 14:57:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:03,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:03,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:03,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306016483] [2022-01-28 14:57:03,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306016483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:03,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023894432] [2022-01-28 14:57:03,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:03,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:03,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:03,460 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) [2022-01-28 14:57:03,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-01-28 14:57:03,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:57:03,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:03,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:03,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:03,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:03,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:03,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:03,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:03,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:03,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:03,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:03,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:03,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:03,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:03,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:03,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:03,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:03,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023894432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:03,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:03,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:57:03,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569140033] [2022-01-28 14:57:03,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:03,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:57:03,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:57:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:57:03,849 INFO L87 Difference]: Start difference. First operand 595 states and 1908 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) [2022-01-28 14:57:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:03,968 INFO L93 Difference]: Finished difference Result 663 states and 2103 transitions. [2022-01-28 14:57:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:57:03,968 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 [2022-01-28 14:57:03,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:03,969 INFO L225 Difference]: With dead ends: 663 [2022-01-28 14:57:03,969 INFO L226 Difference]: Without dead ends: 641 [2022-01-28 14:57:03,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:57:03,970 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:03,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 99 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 312 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-28 14:57:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-28 14:57:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 598. [2022-01-28 14:57:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.2160804020100504) internal successors, (1920), 597 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1920 transitions. [2022-01-28 14:57:03,976 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1920 transitions. Word has length 21 [2022-01-28 14:57:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:03,976 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1920 transitions. [2022-01-28 14:57:03,976 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) [2022-01-28 14:57:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1920 transitions. [2022-01-28 14:57:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:03,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:03,977 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] [2022-01-28 14:57:03,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-01-28 14:57:04,177 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 [2022-01-28 14:57:04,177 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:04,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:04,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1468843129, now seen corresponding path program 378 times [2022-01-28 14:57:04,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:04,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191512166] [2022-01-28 14:57:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:04,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:04,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:04,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191512166] [2022-01-28 14:57:04,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191512166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:04,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855288315] [2022-01-28 14:57:04,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:04,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:04,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:04,284 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) [2022-01-28 14:57:04,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-01-28 14:57:04,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:57:04,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:04,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:04,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:04,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:04,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:04,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:04,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:04,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:04,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:04,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:04,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:04,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:04,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:04,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:04,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:04,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:04,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855288315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:04,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:04,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:57:04,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213422145] [2022-01-28 14:57:04,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:04,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:04,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:04,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:04,679 INFO L87 Difference]: Start difference. First operand 598 states and 1920 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) [2022-01-28 14:57:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:04,808 INFO L93 Difference]: Finished difference Result 683 states and 2144 transitions. [2022-01-28 14:57:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:57:04,808 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 [2022-01-28 14:57:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:04,809 INFO L225 Difference]: With dead ends: 683 [2022-01-28 14:57:04,809 INFO L226 Difference]: Without dead ends: 661 [2022-01-28 14:57:04,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:04,810 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:04,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 151 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 347 Invalid, 0 Unknown, 162 Unchecked, 0.1s Time] [2022-01-28 14:57:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-28 14:57:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 595. [2022-01-28 14:57:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.212121212121212) internal successors, (1908), 594 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1908 transitions. [2022-01-28 14:57:04,816 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1908 transitions. Word has length 21 [2022-01-28 14:57:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:04,816 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1908 transitions. [2022-01-28 14:57:04,816 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) [2022-01-28 14:57:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1908 transitions. [2022-01-28 14:57:04,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:04,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:04,817 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:04,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Ended with exit code 0 [2022-01-28 14:57:05,017 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 [2022-01-28 14:57:05,017 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash 591387152, now seen corresponding path program 379 times [2022-01-28 14:57:05,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:05,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401642936] [2022-01-28 14:57:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:05,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:05,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401642936] [2022-01-28 14:57:05,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401642936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900943835] [2022-01-28 14:57:05,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:05,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:05,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:05,124 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) [2022-01-28 14:57:05,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-01-28 14:57:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:05,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:05,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:05,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:05,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:05,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:05,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:05,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:05,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:05,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:05,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:05,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:05,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:05,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:05,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:05,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:05,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900943835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:05,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:05,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:05,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18226002] [2022-01-28 14:57:05,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:05,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:05,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:05,565 INFO L87 Difference]: Start difference. First operand 595 states and 1908 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) [2022-01-28 14:57:05,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:05,821 INFO L93 Difference]: Finished difference Result 773 states and 2428 transitions. [2022-01-28 14:57:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:57:05,821 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 [2022-01-28 14:57:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:05,822 INFO L225 Difference]: With dead ends: 773 [2022-01-28 14:57:05,822 INFO L226 Difference]: Without dead ends: 750 [2022-01-28 14:57:05,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:57:05,822 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:05,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 137 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 444 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-28 14:57:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-01-28 14:57:05,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 595. [2022-01-28 14:57:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.212121212121212) internal successors, (1908), 594 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1908 transitions. [2022-01-28 14:57:05,829 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1908 transitions. Word has length 21 [2022-01-28 14:57:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:05,829 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1908 transitions. [2022-01-28 14:57:05,829 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) [2022-01-28 14:57:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1908 transitions. [2022-01-28 14:57:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:05,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:05,830 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:05,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:06,030 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 [2022-01-28 14:57:06,031 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1194628149, now seen corresponding path program 380 times [2022-01-28 14:57:06,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:06,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968844618] [2022-01-28 14:57:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:06,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:06,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:06,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968844618] [2022-01-28 14:57:06,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968844618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:06,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628025767] [2022-01-28 14:57:06,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:06,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:06,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:06,141 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) [2022-01-28 14:57:06,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-01-28 14:57:06,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:06,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:06,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:06,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:06,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:06,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:06,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:06,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:06,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:06,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:06,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:06,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:06,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:06,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:06,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:06,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:06,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628025767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:06,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:06,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:57:06,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117442887] [2022-01-28 14:57:06,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:06,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:06,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:06,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:06,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:06,605 INFO L87 Difference]: Start difference. First operand 595 states and 1908 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) [2022-01-28 14:57:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:07,076 INFO L93 Difference]: Finished difference Result 888 states and 2759 transitions. [2022-01-28 14:57:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:07,076 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 [2022-01-28 14:57:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:07,077 INFO L225 Difference]: With dead ends: 888 [2022-01-28 14:57:07,077 INFO L226 Difference]: Without dead ends: 861 [2022-01-28 14:57:07,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:57:07,078 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:07,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 251 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 821 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2022-01-28 14:57:07,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-28 14:57:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 600. [2022-01-28 14:57:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.2287145242070117) internal successors, (1934), 599 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1934 transitions. [2022-01-28 14:57:07,085 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1934 transitions. Word has length 21 [2022-01-28 14:57:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:07,085 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1934 transitions. [2022-01-28 14:57:07,085 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) [2022-01-28 14:57:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1934 transitions. [2022-01-28 14:57:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:07,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:07,086 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:07,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Ended with exit code 0 [2022-01-28 14:57:07,286 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 [2022-01-28 14:57:07,286 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1945729757, now seen corresponding path program 381 times [2022-01-28 14:57:07,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:07,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530098512] [2022-01-28 14:57:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:07,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:07,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:07,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530098512] [2022-01-28 14:57:07,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530098512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:07,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073287068] [2022-01-28 14:57:07,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:07,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:07,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:07,392 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) [2022-01-28 14:57:07,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-01-28 14:57:07,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:07,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:07,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:07,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:07,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:07,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:07,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:07,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:07,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:07,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:07,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:07,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:07,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:07,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:07,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:07,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:07,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073287068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:07,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:07,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:57:07,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741804303] [2022-01-28 14:57:07,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:07,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:57:07,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:57:07,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:57:07,750 INFO L87 Difference]: Start difference. First operand 600 states and 1934 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) [2022-01-28 14:57:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:07,912 INFO L93 Difference]: Finished difference Result 675 states and 2145 transitions. [2022-01-28 14:57:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:57:07,912 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 [2022-01-28 14:57:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:07,913 INFO L225 Difference]: With dead ends: 675 [2022-01-28 14:57:07,913 INFO L226 Difference]: Without dead ends: 646 [2022-01-28 14:57:07,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:57:07,913 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:07,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 436 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-01-28 14:57:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-01-28 14:57:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 597. [2022-01-28 14:57:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.226510067114094) internal successors, (1923), 596 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1923 transitions. [2022-01-28 14:57:07,920 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1923 transitions. Word has length 21 [2022-01-28 14:57:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:07,920 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1923 transitions. [2022-01-28 14:57:07,920 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) [2022-01-28 14:57:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1923 transitions. [2022-01-28 14:57:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:07,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:07,920 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] [2022-01-28 14:57:07,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-01-28 14:57:08,121 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 [2022-01-28 14:57:08,121 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:08,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash -573055112, now seen corresponding path program 382 times [2022-01-28 14:57:08,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:08,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593313171] [2022-01-28 14:57:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:08,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:08,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:08,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593313171] [2022-01-28 14:57:08,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593313171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:08,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870906978] [2022-01-28 14:57:08,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:08,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:08,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:08,239 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) [2022-01-28 14:57:08,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-01-28 14:57:08,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:08,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:08,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:08,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:08,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:08,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:08,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:08,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:08,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:08,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:08,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:08,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:08,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:08,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:08,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:08,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:08,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:08,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:08,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870906978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:08,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:08,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:08,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872309146] [2022-01-28 14:57:08,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:08,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:08,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:08,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:08,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:08,721 INFO L87 Difference]: Start difference. First operand 597 states and 1923 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) [2022-01-28 14:57:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:08,987 INFO L93 Difference]: Finished difference Result 792 states and 2469 transitions. [2022-01-28 14:57:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:57:08,988 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 [2022-01-28 14:57:08,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:08,989 INFO L225 Difference]: With dead ends: 792 [2022-01-28 14:57:08,989 INFO L226 Difference]: Without dead ends: 765 [2022-01-28 14:57:08,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:08,989 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:08,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 194 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 554 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-28 14:57:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-28 14:57:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 599. [2022-01-28 14:57:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2240802675585285) internal successors, (1928), 598 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1928 transitions. [2022-01-28 14:57:08,996 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1928 transitions. Word has length 21 [2022-01-28 14:57:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:08,996 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1928 transitions. [2022-01-28 14:57:08,996 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) [2022-01-28 14:57:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1928 transitions. [2022-01-28 14:57:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:08,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:08,997 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:09,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Ended with exit code 0 [2022-01-28 14:57:09,197 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 [2022-01-28 14:57:09,197 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:09,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1184795275, now seen corresponding path program 383 times [2022-01-28 14:57:09,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:09,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966609310] [2022-01-28 14:57:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:09,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:09,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:09,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966609310] [2022-01-28 14:57:09,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966609310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:09,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523745524] [2022-01-28 14:57:09,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:09,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:09,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:09,310 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) [2022-01-28 14:57:09,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-01-28 14:57:09,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:09,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:09,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:09,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:09,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:09,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:09,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:09,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:09,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:09,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:09,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:09,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:09,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:09,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:09,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:09,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:09,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:09,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523745524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:09,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:09,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:57:09,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197062157] [2022-01-28 14:57:09,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:09,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:09,732 INFO L87 Difference]: Start difference. First operand 599 states and 1928 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) [2022-01-28 14:57:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:09,889 INFO L93 Difference]: Finished difference Result 699 states and 2194 transitions. [2022-01-28 14:57:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:57:09,889 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 [2022-01-28 14:57:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:09,890 INFO L225 Difference]: With dead ends: 699 [2022-01-28 14:57:09,890 INFO L226 Difference]: Without dead ends: 677 [2022-01-28 14:57:09,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:09,890 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:09,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 142 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 339 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-01-28 14:57:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-28 14:57:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 599. [2022-01-28 14:57:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2240802675585285) internal successors, (1928), 598 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1928 transitions. [2022-01-28 14:57:09,897 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1928 transitions. Word has length 21 [2022-01-28 14:57:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:09,897 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1928 transitions. [2022-01-28 14:57:09,897 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) [2022-01-28 14:57:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1928 transitions. [2022-01-28 14:57:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:09,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:09,898 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] [2022-01-28 14:57:09,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Ended with exit code 0 [2022-01-28 14:57:10,098 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 [2022-01-28 14:57:10,098 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:10,098 INFO L85 PathProgramCache]: Analyzing trace with hash 23050804, now seen corresponding path program 384 times [2022-01-28 14:57:10,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:10,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058604971] [2022-01-28 14:57:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:10,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:10,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:10,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058604971] [2022-01-28 14:57:10,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058604971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:10,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272838709] [2022-01-28 14:57:10,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:10,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:10,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:10,224 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) [2022-01-28 14:57:10,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-01-28 14:57:10,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:57:10,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:10,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:10,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:10,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:10,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:10,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:10,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:10,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:10,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:10,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:10,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:10,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:10,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:10,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:10,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:10,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272838709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:10,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:10,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:10,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406002188] [2022-01-28 14:57:10,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:10,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:10,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:10,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:10,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:10,696 INFO L87 Difference]: Start difference. First operand 599 states and 1928 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) [2022-01-28 14:57:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:11,117 INFO L93 Difference]: Finished difference Result 883 states and 2718 transitions. [2022-01-28 14:57:11,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:57:11,117 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 [2022-01-28 14:57:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:11,118 INFO L225 Difference]: With dead ends: 883 [2022-01-28 14:57:11,118 INFO L226 Difference]: Without dead ends: 860 [2022-01-28 14:57:11,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:57:11,119 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 81 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:11,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 181 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 526 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-28 14:57:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-01-28 14:57:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 599. [2022-01-28 14:57:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2240802675585285) internal successors, (1928), 598 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1928 transitions. [2022-01-28 14:57:11,126 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1928 transitions. Word has length 21 [2022-01-28 14:57:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:11,126 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1928 transitions. [2022-01-28 14:57:11,126 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) [2022-01-28 14:57:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1928 transitions. [2022-01-28 14:57:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:11,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:11,127 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:11,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Ended with exit code 0 [2022-01-28 14:57:11,329 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 [2022-01-28 14:57:11,329 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:11,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2019418305, now seen corresponding path program 385 times [2022-01-28 14:57:11,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:11,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826789224] [2022-01-28 14:57:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:11,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:11,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826789224] [2022-01-28 14:57:11,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826789224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:11,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826680117] [2022-01-28 14:57:11,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:11,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:11,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:11,436 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) [2022-01-28 14:57:11,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-01-28 14:57:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:11,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:11,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:11,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:11,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:11,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:11,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:11,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:11,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:11,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:11,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:11,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:11,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:11,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:11,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826680117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:11,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:11,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:57:11,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345256798] [2022-01-28 14:57:11,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:11,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:11,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:11,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:11,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:11,824 INFO L87 Difference]: Start difference. First operand 599 states and 1928 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) [2022-01-28 14:57:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:11,989 INFO L93 Difference]: Finished difference Result 693 states and 2178 transitions. [2022-01-28 14:57:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:11,990 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 [2022-01-28 14:57:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:11,991 INFO L225 Difference]: With dead ends: 693 [2022-01-28 14:57:11,991 INFO L226 Difference]: Without dead ends: 664 [2022-01-28 14:57:11,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:11,991 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:11,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 180 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 430 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-01-28 14:57:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-28 14:57:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 597. [2022-01-28 14:57:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.226510067114094) internal successors, (1923), 596 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1923 transitions. [2022-01-28 14:57:11,997 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1923 transitions. Word has length 21 [2022-01-28 14:57:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:11,997 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1923 transitions. [2022-01-28 14:57:11,997 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) [2022-01-28 14:57:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1923 transitions. [2022-01-28 14:57:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:11,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:11,998 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:12,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-01-28 14:57:12,198 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 [2022-01-28 14:57:12,199 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash -875627883, now seen corresponding path program 386 times [2022-01-28 14:57:12,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:12,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219436324] [2022-01-28 14:57:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:12,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:12,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:12,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219436324] [2022-01-28 14:57:12,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219436324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:12,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614762293] [2022-01-28 14:57:12,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:12,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:12,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:12,304 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) [2022-01-28 14:57:12,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-01-28 14:57:12,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:12,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:12,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:12,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:12,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:12,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:12,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:12,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:12,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:12,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:12,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:12,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:12,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:12,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:12,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:12,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:12,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:12,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614762293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:12,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:12,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:12,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795273335] [2022-01-28 14:57:12,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:12,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:12,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:12,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:12,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:12,784 INFO L87 Difference]: Start difference. First operand 597 states and 1923 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) [2022-01-28 14:57:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:13,105 INFO L93 Difference]: Finished difference Result 764 states and 2409 transitions. [2022-01-28 14:57:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:13,106 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 [2022-01-28 14:57:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:13,107 INFO L225 Difference]: With dead ends: 764 [2022-01-28 14:57:13,107 INFO L226 Difference]: Without dead ends: 743 [2022-01-28 14:57:13,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:57:13,107 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 65 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:13,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 196 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 596 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-01-28 14:57:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-28 14:57:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 600. [2022-01-28 14:57:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.2303839732888147) internal successors, (1935), 599 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1935 transitions. [2022-01-28 14:57:13,114 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1935 transitions. Word has length 21 [2022-01-28 14:57:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:13,114 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1935 transitions. [2022-01-28 14:57:13,114 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) [2022-01-28 14:57:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1935 transitions. [2022-01-28 14:57:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:13,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:13,115 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] [2022-01-28 14:57:13,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Ended with exit code 0 [2022-01-28 14:57:13,315 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 [2022-01-28 14:57:13,315 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash -279521967, now seen corresponding path program 387 times [2022-01-28 14:57:13,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:13,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083942984] [2022-01-28 14:57:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:13,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:13,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:13,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083942984] [2022-01-28 14:57:13,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083942984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:13,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772668569] [2022-01-28 14:57:13,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:13,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:13,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:13,448 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) [2022-01-28 14:57:13,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-01-28 14:57:13,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:13,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:13,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:13,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:13,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:13,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:13,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:13,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:13,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:13,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:13,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:13,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:13,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:13,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:13,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772668569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:13,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:13,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:13,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384958932] [2022-01-28 14:57:13,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:13,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:13,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:13,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:13,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:13,925 INFO L87 Difference]: Start difference. First operand 600 states and 1935 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) [2022-01-28 14:57:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:14,121 INFO L93 Difference]: Finished difference Result 720 states and 2282 transitions. [2022-01-28 14:57:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:57:14,121 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 [2022-01-28 14:57:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:14,122 INFO L225 Difference]: With dead ends: 720 [2022-01-28 14:57:14,122 INFO L226 Difference]: Without dead ends: 699 [2022-01-28 14:57:14,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:57:14,123 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:14,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 130 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 303 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-01-28 14:57:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-28 14:57:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 600. [2022-01-28 14:57:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.2303839732888147) internal successors, (1935), 599 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1935 transitions. [2022-01-28 14:57:14,129 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1935 transitions. Word has length 21 [2022-01-28 14:57:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:14,129 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1935 transitions. [2022-01-28 14:57:14,129 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) [2022-01-28 14:57:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1935 transitions. [2022-01-28 14:57:14,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:14,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:14,130 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] [2022-01-28 14:57:14,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Ended with exit code 0 [2022-01-28 14:57:14,330 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 [2022-01-28 14:57:14,330 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:14,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1235039221, now seen corresponding path program 388 times [2022-01-28 14:57:14,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:14,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742625178] [2022-01-28 14:57:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:14,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:14,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:14,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742625178] [2022-01-28 14:57:14,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742625178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:14,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690869858] [2022-01-28 14:57:14,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:14,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:14,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:14,487 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) [2022-01-28 14:57:14,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-01-28 14:57:14,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:14,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:14,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:14,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:14,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:14,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:14,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:14,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:14,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:14,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:14,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:14,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:14,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:14,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:14,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:14,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690869858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:14,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:14,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:14,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007732317] [2022-01-28 14:57:14,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:14,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:14,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:14,969 INFO L87 Difference]: Start difference. First operand 600 states and 1935 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) [2022-01-28 14:57:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:15,313 INFO L93 Difference]: Finished difference Result 778 states and 2440 transitions. [2022-01-28 14:57:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:15,313 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 [2022-01-28 14:57:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:15,314 INFO L225 Difference]: With dead ends: 778 [2022-01-28 14:57:15,314 INFO L226 Difference]: Without dead ends: 763 [2022-01-28 14:57:15,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:57:15,315 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 91 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:15,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 210 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 630 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-01-28 14:57:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-28 14:57:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 596. [2022-01-28 14:57:15,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.223529411764706) internal successors, (1918), 595 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1918 transitions. [2022-01-28 14:57:15,322 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1918 transitions. Word has length 21 [2022-01-28 14:57:15,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:15,322 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1918 transitions. [2022-01-28 14:57:15,322 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) [2022-01-28 14:57:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1918 transitions. [2022-01-28 14:57:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:15,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:15,323 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] [2022-01-28 14:57:15,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Ended with exit code 0 [2022-01-28 14:57:15,523 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 [2022-01-28 14:57:15,523 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1794179582, now seen corresponding path program 389 times [2022-01-28 14:57:15,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:15,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515998396] [2022-01-28 14:57:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:15,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:15,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:15,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515998396] [2022-01-28 14:57:15,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515998396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:15,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843475314] [2022-01-28 14:57:15,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:15,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:15,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:15,655 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) [2022-01-28 14:57:15,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-01-28 14:57:15,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:57:15,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:15,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:15,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:15,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:15,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:15,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:15,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:15,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:15,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:15,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:16,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:16,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:16,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:16,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:16,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:16,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843475314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:16,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:16,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:16,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052170196] [2022-01-28 14:57:16,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:16,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:16,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:16,115 INFO L87 Difference]: Start difference. First operand 596 states and 1918 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) [2022-01-28 14:57:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:16,394 INFO L93 Difference]: Finished difference Result 777 states and 2450 transitions. [2022-01-28 14:57:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:57:16,395 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 [2022-01-28 14:57:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:16,396 INFO L225 Difference]: With dead ends: 777 [2022-01-28 14:57:16,396 INFO L226 Difference]: Without dead ends: 754 [2022-01-28 14:57:16,396 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 [2022-01-28 14:57:16,396 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:16,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 170 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 561 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-28 14:57:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-28 14:57:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 599. [2022-01-28 14:57:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2274247491638794) internal successors, (1930), 598 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1930 transitions. [2022-01-28 14:57:16,403 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1930 transitions. Word has length 21 [2022-01-28 14:57:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:16,403 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1930 transitions. [2022-01-28 14:57:16,403 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) [2022-01-28 14:57:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1930 transitions. [2022-01-28 14:57:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:16,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:16,404 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] [2022-01-28 14:57:16,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Ended with exit code 0 [2022-01-28 14:57:16,604 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 [2022-01-28 14:57:16,604 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:16,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:16,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1190938585, now seen corresponding path program 390 times [2022-01-28 14:57:16,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:16,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907448458] [2022-01-28 14:57:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:16,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:16,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:16,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907448458] [2022-01-28 14:57:16,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907448458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:16,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470521626] [2022-01-28 14:57:16,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:16,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:16,717 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) [2022-01-28 14:57:16,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-01-28 14:57:16,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:57:16,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:16,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:16,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:16,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:16,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:16,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:16,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:16,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:16,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:17,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:17,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:17,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:17,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:17,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:17,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:17,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470521626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:17,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:17,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:17,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33862111] [2022-01-28 14:57:17,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:17,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:17,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:17,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:17,193 INFO L87 Difference]: Start difference. First operand 599 states and 1930 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) [2022-01-28 14:57:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:17,574 INFO L93 Difference]: Finished difference Result 821 states and 2574 transitions. [2022-01-28 14:57:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:17,574 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 [2022-01-28 14:57:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:17,575 INFO L225 Difference]: With dead ends: 821 [2022-01-28 14:57:17,575 INFO L226 Difference]: Without dead ends: 794 [2022-01-28 14:57:17,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:57:17,576 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:17,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 195 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 679 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-28 14:57:17,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-01-28 14:57:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 601. [2022-01-28 14:57:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.235) internal successors, (1941), 600 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1941 transitions. [2022-01-28 14:57:17,583 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1941 transitions. Word has length 21 [2022-01-28 14:57:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:17,583 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1941 transitions. [2022-01-28 14:57:17,583 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) [2022-01-28 14:57:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1941 transitions. [2022-01-28 14:57:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:17,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:17,584 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:17,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Ended with exit code 0 [2022-01-28 14:57:17,784 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 [2022-01-28 14:57:17,784 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash -36329195, now seen corresponding path program 391 times [2022-01-28 14:57:17,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646847790] [2022-01-28 14:57:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:17,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:17,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:17,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646847790] [2022-01-28 14:57:17,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646847790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:17,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158424923] [2022-01-28 14:57:17,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:17,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:17,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:17,890 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) [2022-01-28 14:57:17,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-01-28 14:57:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:17,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:17,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:17,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:18,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:18,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:18,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:18,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:18,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:18,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:18,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:18,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:18,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:18,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:18,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158424923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:18,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:18,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:57:18,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217955792] [2022-01-28 14:57:18,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:18,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:57:18,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:18,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:57:18,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:57:18,247 INFO L87 Difference]: Start difference. First operand 601 states and 1941 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) [2022-01-28 14:57:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:18,399 INFO L93 Difference]: Finished difference Result 674 states and 2147 transitions. [2022-01-28 14:57:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:57:18,399 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 [2022-01-28 14:57:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:18,400 INFO L225 Difference]: With dead ends: 674 [2022-01-28 14:57:18,400 INFO L226 Difference]: Without dead ends: 645 [2022-01-28 14:57:18,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:57:18,400 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:18,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 138 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 397 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-01-28 14:57:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-28 14:57:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 600. [2022-01-28 14:57:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.2303839732888147) internal successors, (1935), 599 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1935 transitions. [2022-01-28 14:57:18,406 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1935 transitions. Word has length 21 [2022-01-28 14:57:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:18,406 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1935 transitions. [2022-01-28 14:57:18,407 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) [2022-01-28 14:57:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1935 transitions. [2022-01-28 14:57:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:18,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:18,407 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:18,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Ended with exit code 0 [2022-01-28 14:57:18,607 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 [2022-01-28 14:57:18,608 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:18,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1690669428, now seen corresponding path program 392 times [2022-01-28 14:57:18,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:18,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519348585] [2022-01-28 14:57:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:18,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:18,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519348585] [2022-01-28 14:57:18,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519348585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297796461] [2022-01-28 14:57:18,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:18,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:18,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:18,718 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) [2022-01-28 14:57:18,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-01-28 14:57:18,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:18,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:18,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:18,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:18,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:18,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:18,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:18,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:18,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:18,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:19,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:19,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:19,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:19,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:19,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:19,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:19,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297796461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:19,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:19,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:57:19,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846925452] [2022-01-28 14:57:19,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:19,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:19,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:19,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:19,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:19,146 INFO L87 Difference]: Start difference. First operand 600 states and 1935 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) [2022-01-28 14:57:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:19,321 INFO L93 Difference]: Finished difference Result 714 states and 2269 transitions. [2022-01-28 14:57:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:19,321 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 [2022-01-28 14:57:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:19,322 INFO L225 Difference]: With dead ends: 714 [2022-01-28 14:57:19,322 INFO L226 Difference]: Without dead ends: 695 [2022-01-28 14:57:19,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:19,322 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:19,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 116 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 371 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-28 14:57:19,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-28 14:57:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 603. [2022-01-28 14:57:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.23421926910299) internal successors, (1947), 602 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1947 transitions. [2022-01-28 14:57:19,329 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1947 transitions. Word has length 21 [2022-01-28 14:57:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:19,329 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 1947 transitions. [2022-01-28 14:57:19,329 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) [2022-01-28 14:57:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1947 transitions. [2022-01-28 14:57:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:19,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:19,329 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:19,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Ended with exit code 0 [2022-01-28 14:57:19,530 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 [2022-01-28 14:57:19,530 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:19,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:19,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1080490784, now seen corresponding path program 393 times [2022-01-28 14:57:19,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:19,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671027944] [2022-01-28 14:57:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:19,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:19,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:19,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671027944] [2022-01-28 14:57:19,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671027944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:19,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084872481] [2022-01-28 14:57:19,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:19,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:19,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:19,651 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) [2022-01-28 14:57:19,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-01-28 14:57:19,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:19,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:19,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:19,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:19,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:19,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:19,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:19,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:19,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:19,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:20,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:20,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:20,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:20,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:20,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:20,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084872481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:20,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:20,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:20,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548094658] [2022-01-28 14:57:20,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:20,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:20,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:20,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:20,132 INFO L87 Difference]: Start difference. First operand 603 states and 1947 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) [2022-01-28 14:57:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:20,337 INFO L93 Difference]: Finished difference Result 749 states and 2346 transitions. [2022-01-28 14:57:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:57:20,337 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 [2022-01-28 14:57:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:20,338 INFO L225 Difference]: With dead ends: 749 [2022-01-28 14:57:20,338 INFO L226 Difference]: Without dead ends: 727 [2022-01-28 14:57:20,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:57:20,339 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:20,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 179 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 423 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-01-28 14:57:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-28 14:57:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 604. [2022-01-28 14:57:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.2354892205638475) internal successors, (1951), 603 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1951 transitions. [2022-01-28 14:57:20,346 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1951 transitions. Word has length 21 [2022-01-28 14:57:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:20,346 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 1951 transitions. [2022-01-28 14:57:20,346 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) [2022-01-28 14:57:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1951 transitions. [2022-01-28 14:57:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:20,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:20,346 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:20,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:20,547 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 [2022-01-28 14:57:20,547 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:20,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1349365876, now seen corresponding path program 394 times [2022-01-28 14:57:20,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:20,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954570592] [2022-01-28 14:57:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:20,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:20,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:20,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954570592] [2022-01-28 14:57:20,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954570592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:20,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790467428] [2022-01-28 14:57:20,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:20,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:20,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:20,660 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) [2022-01-28 14:57:20,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-01-28 14:57:20,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:20,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:20,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:20,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:20,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:20,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:20,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:20,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:20,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:20,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:20,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:21,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:21,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:21,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:21,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:21,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:21,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:21,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790467428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:21,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:21,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:21,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344528316] [2022-01-28 14:57:21,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:21,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:21,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:21,160 INFO L87 Difference]: Start difference. First operand 604 states and 1951 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) [2022-01-28 14:57:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:21,466 INFO L93 Difference]: Finished difference Result 819 states and 2523 transitions. [2022-01-28 14:57:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:57:21,466 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 [2022-01-28 14:57:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:21,467 INFO L225 Difference]: With dead ends: 819 [2022-01-28 14:57:21,467 INFO L226 Difference]: Without dead ends: 781 [2022-01-28 14:57:21,467 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 [2022-01-28 14:57:21,468 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:21,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 258 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 608 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-01-28 14:57:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-01-28 14:57:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 612. [2022-01-28 14:57:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.227495908346972) internal successors, (1972), 611 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1972 transitions. [2022-01-28 14:57:21,474 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1972 transitions. Word has length 21 [2022-01-28 14:57:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:21,474 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1972 transitions. [2022-01-28 14:57:21,474 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) [2022-01-28 14:57:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1972 transitions. [2022-01-28 14:57:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:21,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:21,475 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:21,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-01-28 14:57:21,675 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 [2022-01-28 14:57:21,676 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash 673983948, now seen corresponding path program 395 times [2022-01-28 14:57:21,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815040736] [2022-01-28 14:57:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:21,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:21,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815040736] [2022-01-28 14:57:21,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815040736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:21,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388602049] [2022-01-28 14:57:21,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:21,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:21,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:21,788 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) [2022-01-28 14:57:21,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-01-28 14:57:21,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:57:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:21,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:21,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:21,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:21,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:22,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:22,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:22,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:22,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:22,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:22,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:22,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:22,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:22,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:22,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:22,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:22,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388602049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:22,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:22,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:22,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015600847] [2022-01-28 14:57:22,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:22,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:22,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:22,303 INFO L87 Difference]: Start difference. First operand 612 states and 1972 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) [2022-01-28 14:57:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:22,586 INFO L93 Difference]: Finished difference Result 771 states and 2400 transitions. [2022-01-28 14:57:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:57:22,586 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 [2022-01-28 14:57:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:22,587 INFO L225 Difference]: With dead ends: 771 [2022-01-28 14:57:22,587 INFO L226 Difference]: Without dead ends: 768 [2022-01-28 14:57:22,587 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 [2022-01-28 14:57:22,587 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 91 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:22,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 236 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 569 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2022-01-28 14:57:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-28 14:57:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 600. [2022-01-28 14:57:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.2303839732888147) internal successors, (1935), 599 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1935 transitions. [2022-01-28 14:57:22,594 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1935 transitions. Word has length 21 [2022-01-28 14:57:22,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:22,594 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1935 transitions. [2022-01-28 14:57:22,594 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) [2022-01-28 14:57:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1935 transitions. [2022-01-28 14:57:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:22,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:22,595 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:22,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Ended with exit code 0 [2022-01-28 14:57:22,795 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 [2022-01-28 14:57:22,795 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1184317933, now seen corresponding path program 396 times [2022-01-28 14:57:22,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:22,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508167803] [2022-01-28 14:57:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:22,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:22,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:22,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508167803] [2022-01-28 14:57:22,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508167803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:22,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653426540] [2022-01-28 14:57:22,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:22,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:22,905 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) [2022-01-28 14:57:22,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-01-28 14:57:22,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:57:22,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:22,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:23,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:23,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:23,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:23,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:23,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:23,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:23,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:23,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:23,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:23,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:23,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:23,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:23,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653426540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:23,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:23,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:57:23,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038503748] [2022-01-28 14:57:23,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:23,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:23,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:23,409 INFO L87 Difference]: Start difference. First operand 600 states and 1935 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) [2022-01-28 14:57:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:23,769 INFO L93 Difference]: Finished difference Result 892 states and 2738 transitions. [2022-01-28 14:57:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:57:23,769 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 [2022-01-28 14:57:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:23,770 INFO L225 Difference]: With dead ends: 892 [2022-01-28 14:57:23,770 INFO L226 Difference]: Without dead ends: 865 [2022-01-28 14:57:23,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:57:23,770 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:23,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 178 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 536 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-01-28 14:57:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-01-28 14:57:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 606. [2022-01-28 14:57:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.234710743801653) internal successors, (1957), 605 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1957 transitions. [2022-01-28 14:57:23,778 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1957 transitions. Word has length 21 [2022-01-28 14:57:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:23,778 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1957 transitions. [2022-01-28 14:57:23,778 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) [2022-01-28 14:57:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1957 transitions. [2022-01-28 14:57:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:23,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:23,779 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:23,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-01-28 14:57:23,979 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 [2022-01-28 14:57:23,979 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:23,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1819749529, now seen corresponding path program 397 times [2022-01-28 14:57:23,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:23,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648946644] [2022-01-28 14:57:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:23,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:24,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648946644] [2022-01-28 14:57:24,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648946644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622716521] [2022-01-28 14:57:24,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:24,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:24,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:24,093 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) [2022-01-28 14:57:24,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-01-28 14:57:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:24,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:24,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:24,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:24,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:24,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:24,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:24,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:24,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:24,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:24,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:24,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:24,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:24,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:24,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622716521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:24,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:24,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:57:24,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365385940] [2022-01-28 14:57:24,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:24,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:24,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:24,487 INFO L87 Difference]: Start difference. First operand 606 states and 1957 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) [2022-01-28 14:57:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:24,666 INFO L93 Difference]: Finished difference Result 699 states and 2208 transitions. [2022-01-28 14:57:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:24,666 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 [2022-01-28 14:57:24,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:24,667 INFO L225 Difference]: With dead ends: 699 [2022-01-28 14:57:24,667 INFO L226 Difference]: Without dead ends: 663 [2022-01-28 14:57:24,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:24,667 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:24,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 151 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 471 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-01-28 14:57:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-28 14:57:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 604. [2022-01-28 14:57:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.2338308457711444) internal successors, (1950), 603 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1950 transitions. [2022-01-28 14:57:24,674 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1950 transitions. Word has length 21 [2022-01-28 14:57:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:24,674 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 1950 transitions. [2022-01-28 14:57:24,674 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) [2022-01-28 14:57:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1950 transitions. [2022-01-28 14:57:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:24,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:24,675 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:24,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-01-28 14:57:24,875 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 [2022-01-28 14:57:24,875 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:24,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2107916821, now seen corresponding path program 398 times [2022-01-28 14:57:24,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:24,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149339882] [2022-01-28 14:57:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:24,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:24,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:24,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149339882] [2022-01-28 14:57:24,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149339882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:24,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010347784] [2022-01-28 14:57:24,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:24,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:24,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:24,972 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) [2022-01-28 14:57:24,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-01-28 14:57:24,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:24,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:25,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:25,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:25,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:25,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:25,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:25,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:25,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:25,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:25,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:25,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:25,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:25,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:25,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:25,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010347784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:25,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:25,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:57:25,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292264982] [2022-01-28 14:57:25,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:25,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:25,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:25,387 INFO L87 Difference]: Start difference. First operand 604 states and 1950 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) [2022-01-28 14:57:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:25,604 INFO L93 Difference]: Finished difference Result 795 states and 2398 transitions. [2022-01-28 14:57:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:57:25,604 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 [2022-01-28 14:57:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:25,605 INFO L225 Difference]: With dead ends: 795 [2022-01-28 14:57:25,605 INFO L226 Difference]: Without dead ends: 769 [2022-01-28 14:57:25,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:25,606 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 48 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:25,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 266 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 504 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-01-28 14:57:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-28 14:57:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 627. [2022-01-28 14:57:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 3.2172523961661343) internal successors, (2014), 626 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 2014 transitions. [2022-01-28 14:57:25,613 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 2014 transitions. Word has length 21 [2022-01-28 14:57:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:25,613 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 2014 transitions. [2022-01-28 14:57:25,613 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) [2022-01-28 14:57:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 2014 transitions. [2022-01-28 14:57:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:25,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:25,614 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] [2022-01-28 14:57:25,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-01-28 14:57:25,814 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 [2022-01-28 14:57:25,814 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1693747307, now seen corresponding path program 399 times [2022-01-28 14:57:25,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:25,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565461187] [2022-01-28 14:57:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:25,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:25,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:25,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565461187] [2022-01-28 14:57:25,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565461187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:25,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624644935] [2022-01-28 14:57:25,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:25,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:25,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:25,947 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) [2022-01-28 14:57:25,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-01-28 14:57:25,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:25,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:25,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:25,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:26,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:26,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:26,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:26,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:26,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:26,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:26,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:26,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:26,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:26,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:26,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:26,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:26,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:26,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624644935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:26,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:26,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:57:26,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181658944] [2022-01-28 14:57:26,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:26,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:26,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:26,384 INFO L87 Difference]: Start difference. First operand 627 states and 2014 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) [2022-01-28 14:57:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:26,561 INFO L93 Difference]: Finished difference Result 755 states and 2317 transitions. [2022-01-28 14:57:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:26,561 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 [2022-01-28 14:57:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:26,562 INFO L225 Difference]: With dead ends: 755 [2022-01-28 14:57:26,562 INFO L226 Difference]: Without dead ends: 685 [2022-01-28 14:57:26,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:26,562 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:26,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 188 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 460 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-01-28 14:57:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-28 14:57:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 604. [2022-01-28 14:57:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.228855721393035) internal successors, (1947), 603 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1947 transitions. [2022-01-28 14:57:26,568 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1947 transitions. Word has length 21 [2022-01-28 14:57:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:26,568 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 1947 transitions. [2022-01-28 14:57:26,568 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) [2022-01-28 14:57:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1947 transitions. [2022-01-28 14:57:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:26,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:26,569 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] [2022-01-28 14:57:26,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Ended with exit code 0 [2022-01-28 14:57:26,776 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 [2022-01-28 14:57:26,777 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:26,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1771825437, now seen corresponding path program 400 times [2022-01-28 14:57:26,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:26,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891240197] [2022-01-28 14:57:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:26,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:26,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:26,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891240197] [2022-01-28 14:57:26,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891240197] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:26,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730733486] [2022-01-28 14:57:26,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:26,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:26,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:26,891 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) [2022-01-28 14:57:26,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-01-28 14:57:26,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:26,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:26,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:26,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:26,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:26,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:27,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:27,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:27,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:27,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:27,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:27,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:27,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:27,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:27,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:27,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:27,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:27,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730733486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:27,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:27,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:27,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891826077] [2022-01-28 14:57:27,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:27,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:27,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:27,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:27,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:27,452 INFO L87 Difference]: Start difference. First operand 604 states and 1947 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) [2022-01-28 14:57:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:27,665 INFO L93 Difference]: Finished difference Result 820 states and 2554 transitions. [2022-01-28 14:57:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:27,665 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 [2022-01-28 14:57:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:27,666 INFO L225 Difference]: With dead ends: 820 [2022-01-28 14:57:27,666 INFO L226 Difference]: Without dead ends: 778 [2022-01-28 14:57:27,667 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 [2022-01-28 14:57:27,667 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:27,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 178 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 376 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-01-28 14:57:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-28 14:57:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 611. [2022-01-28 14:57:27,672 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) [2022-01-28 14:57:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1974 transitions. [2022-01-28 14:57:27,673 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1974 transitions. Word has length 21 [2022-01-28 14:57:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:27,674 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1974 transitions. [2022-01-28 14:57:27,674 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) [2022-01-28 14:57:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1974 transitions. [2022-01-28 14:57:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:27,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:27,674 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] [2022-01-28 14:57:27,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Ended with exit code 0 [2022-01-28 14:57:27,878 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 [2022-01-28 14:57:27,878 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:27,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1936226257, now seen corresponding path program 401 times [2022-01-28 14:57:27,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:27,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740088715] [2022-01-28 14:57:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:27,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:27,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:27,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740088715] [2022-01-28 14:57:27,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740088715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:27,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665961719] [2022-01-28 14:57:27,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:27,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:27,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:27,994 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) [2022-01-28 14:57:27,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-01-28 14:57:28,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:57:28,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:28,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:28,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:28,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:28,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:28,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:28,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:28,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:28,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:28,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:28,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:28,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:28,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:28,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:28,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665961719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:28,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:28,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:28,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255734865] [2022-01-28 14:57:28,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:28,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:28,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:28,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:28,553 INFO L87 Difference]: Start difference. First operand 611 states and 1974 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) [2022-01-28 14:57:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:28,855 INFO L93 Difference]: Finished difference Result 840 states and 2583 transitions. [2022-01-28 14:57:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:28,855 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 [2022-01-28 14:57:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:28,856 INFO L225 Difference]: With dead ends: 840 [2022-01-28 14:57:28,856 INFO L226 Difference]: Without dead ends: 810 [2022-01-28 14:57:28,856 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 [2022-01-28 14:57:28,856 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:28,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 249 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 647 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-01-28 14:57:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-01-28 14:57:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 619. [2022-01-28 14:57:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.2281553398058254) internal successors, (1995), 618 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1995 transitions. [2022-01-28 14:57:28,864 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1995 transitions. Word has length 21 [2022-01-28 14:57:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:28,864 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1995 transitions. [2022-01-28 14:57:28,864 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) [2022-01-28 14:57:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1995 transitions. [2022-01-28 14:57:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:28,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:28,864 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:28,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Ended with exit code 0 [2022-01-28 14:57:29,065 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 [2022-01-28 14:57:29,065 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1683359111, now seen corresponding path program 402 times [2022-01-28 14:57:29,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:29,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546259617] [2022-01-28 14:57:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:29,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:29,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:29,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546259617] [2022-01-28 14:57:29,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546259617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:29,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204999699] [2022-01-28 14:57:29,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:29,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:29,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:29,180 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) [2022-01-28 14:57:29,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-01-28 14:57:29,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:57:29,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:29,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:29,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:29,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:29,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:29,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:29,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:29,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:29,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:29,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:29,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:29,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:29,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:29,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:29,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:29,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:29,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204999699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:29,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:29,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:29,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38276152] [2022-01-28 14:57:29,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:29,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:29,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:29,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:29,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:29,760 INFO L87 Difference]: Start difference. First operand 619 states and 1995 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) [2022-01-28 14:57:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:30,085 INFO L93 Difference]: Finished difference Result 801 states and 2481 transitions. [2022-01-28 14:57:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:30,086 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 [2022-01-28 14:57:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:30,087 INFO L225 Difference]: With dead ends: 801 [2022-01-28 14:57:30,087 INFO L226 Difference]: Without dead ends: 795 [2022-01-28 14:57:30,087 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 [2022-01-28 14:57:30,087 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:30,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 262 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 675 Invalid, 0 Unknown, 217 Unchecked, 0.3s Time] [2022-01-28 14:57:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-28 14:57:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 615. [2022-01-28 14:57:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 3.234527687296417) internal successors, (1986), 614 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1986 transitions. [2022-01-28 14:57:30,094 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1986 transitions. Word has length 21 [2022-01-28 14:57:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:30,094 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 1986 transitions. [2022-01-28 14:57:30,094 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) [2022-01-28 14:57:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1986 transitions. [2022-01-28 14:57:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:30,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:30,095 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:30,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Ended with exit code 0 [2022-01-28 14:57:30,295 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 [2022-01-28 14:57:30,295 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -497756795, now seen corresponding path program 403 times [2022-01-28 14:57:30,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:30,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373534542] [2022-01-28 14:57:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:30,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:30,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373534542] [2022-01-28 14:57:30,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373534542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154538821] [2022-01-28 14:57:30,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:30,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:30,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:30,410 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) [2022-01-28 14:57:30,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-01-28 14:57:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:30,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:30,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:30,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:30,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:30,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:30,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:30,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:30,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:30,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:30,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:30,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:30,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:30,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:30,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:30,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:30,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154538821] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:30,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:30,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:30,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009655089] [2022-01-28 14:57:30,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:30,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:30,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:30,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:30,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:30,946 INFO L87 Difference]: Start difference. First operand 615 states and 1986 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) [2022-01-28 14:57:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:31,190 INFO L93 Difference]: Finished difference Result 802 states and 2487 transitions. [2022-01-28 14:57:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:31,190 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 [2022-01-28 14:57:31,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:31,191 INFO L225 Difference]: With dead ends: 802 [2022-01-28 14:57:31,191 INFO L226 Difference]: Without dead ends: 784 [2022-01-28 14:57:31,191 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 [2022-01-28 14:57:31,192 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:31,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 177 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 457 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-01-28 14:57:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-01-28 14:57:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 616. [2022-01-28 14:57:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.234146341463415) internal successors, (1989), 615 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1989 transitions. [2022-01-28 14:57:31,200 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1989 transitions. Word has length 21 [2022-01-28 14:57:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:31,200 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1989 transitions. [2022-01-28 14:57:31,200 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) [2022-01-28 14:57:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1989 transitions. [2022-01-28 14:57:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:31,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:31,201 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:31,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:31,401 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 [2022-01-28 14:57:31,402 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:31,402 INFO L85 PathProgramCache]: Analyzing trace with hash 89158807, now seen corresponding path program 404 times [2022-01-28 14:57:31,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:31,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371516579] [2022-01-28 14:57:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:31,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:31,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:31,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371516579] [2022-01-28 14:57:31,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371516579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:31,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312044395] [2022-01-28 14:57:31,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:31,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:31,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:31,521 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) [2022-01-28 14:57:31,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-01-28 14:57:31,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:31,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:31,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:31,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:31,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:31,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:31,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:31,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:31,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:31,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:31,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:32,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:32,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:32,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:32,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:32,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312044395] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:32,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:32,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:32,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691231155] [2022-01-28 14:57:32,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:32,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:32,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:32,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:32,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:32,069 INFO L87 Difference]: Start difference. First operand 616 states and 1989 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) [2022-01-28 14:57:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:32,340 INFO L93 Difference]: Finished difference Result 808 states and 2498 transitions. [2022-01-28 14:57:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:32,341 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 [2022-01-28 14:57:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:32,342 INFO L225 Difference]: With dead ends: 808 [2022-01-28 14:57:32,342 INFO L226 Difference]: Without dead ends: 794 [2022-01-28 14:57:32,342 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 [2022-01-28 14:57:32,342 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:32,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 215 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 534 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-01-28 14:57:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-01-28 14:57:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 618. [2022-01-28 14:57:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.2301458670988654) internal successors, (1993), 617 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1993 transitions. [2022-01-28 14:57:32,349 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1993 transitions. Word has length 21 [2022-01-28 14:57:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:32,349 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 1993 transitions. [2022-01-28 14:57:32,349 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) [2022-01-28 14:57:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1993 transitions. [2022-01-28 14:57:32,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:32,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:32,350 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:32,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-01-28 14:57:32,550 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 [2022-01-28 14:57:32,550 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:32,551 INFO L85 PathProgramCache]: Analyzing trace with hash -586223121, now seen corresponding path program 405 times [2022-01-28 14:57:32,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:32,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465596221] [2022-01-28 14:57:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:32,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:32,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465596221] [2022-01-28 14:57:32,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465596221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348155830] [2022-01-28 14:57:32,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:32,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:32,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:32,686 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) [2022-01-28 14:57:32,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-01-28 14:57:32,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:32,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:32,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:57:32,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:32,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:32,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:32,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:32,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:32,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:32,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:33,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:33,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:33,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:33,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:33,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:33,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:33,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:33,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348155830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:33,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:33,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:33,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116699780] [2022-01-28 14:57:33,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:33,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:33,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:33,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:33,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:33,402 INFO L87 Difference]: Start difference. First operand 618 states and 1993 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) [2022-01-28 14:57:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:33,865 INFO L93 Difference]: Finished difference Result 893 states and 2745 transitions. [2022-01-28 14:57:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:57:33,866 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 [2022-01-28 14:57:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:33,867 INFO L225 Difference]: With dead ends: 893 [2022-01-28 14:57:33,867 INFO L226 Difference]: Without dead ends: 848 [2022-01-28 14:57:33,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:57:33,867 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:33,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 310 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 800 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2022-01-28 14:57:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-28 14:57:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 620. [2022-01-28 14:57:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.2520193861066238) internal successors, (2013), 619 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2013 transitions. [2022-01-28 14:57:33,874 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2013 transitions. Word has length 21 [2022-01-28 14:57:33,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:33,874 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2013 transitions. [2022-01-28 14:57:33,875 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) [2022-01-28 14:57:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2013 transitions. [2022-01-28 14:57:33,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:33,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:33,875 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:33,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:34,075 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 [2022-01-28 14:57:34,076 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:34,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1439855604, now seen corresponding path program 406 times [2022-01-28 14:57:34,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:34,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464861035] [2022-01-28 14:57:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:34,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:34,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:34,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464861035] [2022-01-28 14:57:34,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464861035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:34,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081673416] [2022-01-28 14:57:34,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:34,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:34,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:34,184 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) [2022-01-28 14:57:34,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-01-28 14:57:34,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:34,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:34,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:34,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:34,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:34,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:34,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:34,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:34,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:34,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:34,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:34,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:34,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:57:34,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:34,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:34,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:34,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:34,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081673416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:34,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:34,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:34,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15390914] [2022-01-28 14:57:34,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:34,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:34,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:34,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:34,648 INFO L87 Difference]: Start difference. First operand 620 states and 2013 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) [2022-01-28 14:57:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:34,899 INFO L93 Difference]: Finished difference Result 809 states and 2542 transitions. [2022-01-28 14:57:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:57:34,899 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 [2022-01-28 14:57:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:34,901 INFO L225 Difference]: With dead ends: 809 [2022-01-28 14:57:34,901 INFO L226 Difference]: Without dead ends: 786 [2022-01-28 14:57:34,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:57:34,901 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:34,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 151 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 474 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-28 14:57:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-01-28 14:57:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 622. [2022-01-28 14:57:34,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 3.249597423510467) internal successors, (2018), 621 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 2018 transitions. [2022-01-28 14:57:34,908 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 2018 transitions. Word has length 21 [2022-01-28 14:57:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:34,908 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 2018 transitions. [2022-01-28 14:57:34,908 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) [2022-01-28 14:57:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 2018 transitions. [2022-01-28 14:57:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:34,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:34,909 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:34,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-01-28 14:57:35,109 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 [2022-01-28 14:57:35,109 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:35,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2020488662, now seen corresponding path program 407 times [2022-01-28 14:57:35,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:35,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206314137] [2022-01-28 14:57:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:35,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:35,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206314137] [2022-01-28 14:57:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206314137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:35,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095627760] [2022-01-28 14:57:35,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:35,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:35,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:35,223 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) [2022-01-28 14:57:35,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-01-28 14:57:35,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:57:35,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:35,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:35,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:35,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:35,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:35,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:35,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:35,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:35,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:35,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:35,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:35,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:35,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:35,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:35,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:35,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095627760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:35,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:35,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:35,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043128226] [2022-01-28 14:57:35,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:35,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:35,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:35,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:35,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:35,703 INFO L87 Difference]: Start difference. First operand 622 states and 2018 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) [2022-01-28 14:57:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:35,999 INFO L93 Difference]: Finished difference Result 827 states and 2569 transitions. [2022-01-28 14:57:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:57:35,999 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 [2022-01-28 14:57:35,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:36,001 INFO L225 Difference]: With dead ends: 827 [2022-01-28 14:57:36,001 INFO L226 Difference]: Without dead ends: 808 [2022-01-28 14:57:36,001 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 [2022-01-28 14:57:36,001 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:36,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 257 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 606 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-01-28 14:57:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-28 14:57:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 620. [2022-01-28 14:57:36,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.2520193861066238) internal successors, (2013), 619 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2013 transitions. [2022-01-28 14:57:36,008 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2013 transitions. Word has length 21 [2022-01-28 14:57:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:36,008 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2013 transitions. [2022-01-28 14:57:36,008 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) [2022-01-28 14:57:36,008 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2013 transitions. [2022-01-28 14:57:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:36,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:36,009 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] [2022-01-28 14:57:36,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-01-28 14:57:36,209 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 [2022-01-28 14:57:36,209 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash -386524251, now seen corresponding path program 408 times [2022-01-28 14:57:36,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:36,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746563800] [2022-01-28 14:57:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:36,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:36,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:36,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746563800] [2022-01-28 14:57:36,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746563800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:36,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004543820] [2022-01-28 14:57:36,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:36,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:36,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:36,325 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) [2022-01-28 14:57:36,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-01-28 14:57:36,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:57:36,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:36,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:36,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:36,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:36,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:36,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:36,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:36,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:36,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:36,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:36,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:36,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:36,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:36,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:36,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:36,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004543820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:36,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:36,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:36,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490113743] [2022-01-28 14:57:36,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:36,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:36,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:36,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:36,808 INFO L87 Difference]: Start difference. First operand 620 states and 2013 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) [2022-01-28 14:57:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:37,073 INFO L93 Difference]: Finished difference Result 789 states and 2482 transitions. [2022-01-28 14:57:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:57:37,073 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 [2022-01-28 14:57:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:37,074 INFO L225 Difference]: With dead ends: 789 [2022-01-28 14:57:37,074 INFO L226 Difference]: Without dead ends: 768 [2022-01-28 14:57:37,074 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 [2022-01-28 14:57:37,074 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:37,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 162 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 513 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-28 14:57:37,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-28 14:57:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 620. [2022-01-28 14:57:37,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.2520193861066238) internal successors, (2013), 619 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:37,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2013 transitions. [2022-01-28 14:57:37,081 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2013 transitions. Word has length 21 [2022-01-28 14:57:37,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:37,081 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2013 transitions. [2022-01-28 14:57:37,081 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) [2022-01-28 14:57:37,081 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2013 transitions. [2022-01-28 14:57:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:37,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:37,082 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] [2022-01-28 14:57:37,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Ended with exit code 0 [2022-01-28 14:57:37,282 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 [2022-01-28 14:57:37,283 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:37,283 INFO L85 PathProgramCache]: Analyzing trace with hash -704564761, now seen corresponding path program 409 times [2022-01-28 14:57:37,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:37,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673009479] [2022-01-28 14:57:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:37,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:37,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:37,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673009479] [2022-01-28 14:57:37,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673009479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:37,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083144584] [2022-01-28 14:57:37,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:37,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:37,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:37,397 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) [2022-01-28 14:57:37,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-01-28 14:57:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:37,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:37,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:37,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:37,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:37,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:37,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:37,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:37,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:37,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:37,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:37,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:37,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:37,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:37,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:37,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:37,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:37,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083144584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:37,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:37,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:37,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800442328] [2022-01-28 14:57:37,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:37,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:37,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:37,900 INFO L87 Difference]: Start difference. First operand 620 states and 2013 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) [2022-01-28 14:57:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:38,133 INFO L93 Difference]: Finished difference Result 782 states and 2457 transitions. [2022-01-28 14:57:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:57:38,134 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 [2022-01-28 14:57:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:38,135 INFO L225 Difference]: With dead ends: 782 [2022-01-28 14:57:38,135 INFO L226 Difference]: Without dead ends: 773 [2022-01-28 14:57:38,135 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 [2022-01-28 14:57:38,135 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:38,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 155 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 444 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-01-28 14:57:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-28 14:57:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 620. [2022-01-28 14:57:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.2520193861066238) internal successors, (2013), 619 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2013 transitions. [2022-01-28 14:57:38,142 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2013 transitions. Word has length 21 [2022-01-28 14:57:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:38,142 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 2013 transitions. [2022-01-28 14:57:38,142 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) [2022-01-28 14:57:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2013 transitions. [2022-01-28 14:57:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:38,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:38,143 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] [2022-01-28 14:57:38,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Ended with exit code 0 [2022-01-28 14:57:38,343 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 [2022-01-28 14:57:38,343 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -117649159, now seen corresponding path program 410 times [2022-01-28 14:57:38,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:38,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000790966] [2022-01-28 14:57:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:38,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:38,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:38,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000790966] [2022-01-28 14:57:38,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000790966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:38,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866074123] [2022-01-28 14:57:38,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:38,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:38,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:38,458 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) [2022-01-28 14:57:38,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-01-28 14:57:38,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:38,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:38,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:38,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:38,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:38,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:38,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:38,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:38,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:38,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:38,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:38,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:38,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:38,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:38,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:38,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:38,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:38,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866074123] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:38,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:38,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:38,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804735221] [2022-01-28 14:57:38,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:38,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:38,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:38,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:38,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:38,985 INFO L87 Difference]: Start difference. First operand 620 states and 2013 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) [2022-01-28 14:57:39,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:39,203 INFO L93 Difference]: Finished difference Result 803 states and 2499 transitions. [2022-01-28 14:57:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:39,203 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 [2022-01-28 14:57:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:39,205 INFO L225 Difference]: With dead ends: 803 [2022-01-28 14:57:39,205 INFO L226 Difference]: Without dead ends: 788 [2022-01-28 14:57:39,205 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 [2022-01-28 14:57:39,205 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:39,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 124 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 389 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-01-28 14:57:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-28 14:57:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 617. [2022-01-28 14:57:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 3.25) internal successors, (2002), 616 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 2002 transitions. [2022-01-28 14:57:39,212 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 2002 transitions. Word has length 21 [2022-01-28 14:57:39,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:39,212 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 2002 transitions. [2022-01-28 14:57:39,212 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) [2022-01-28 14:57:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 2002 transitions. [2022-01-28 14:57:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:39,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:39,213 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:39,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-01-28 14:57:39,413 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 [2022-01-28 14:57:39,413 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash -27005411, now seen corresponding path program 411 times [2022-01-28 14:57:39,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:39,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533936543] [2022-01-28 14:57:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:39,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:39,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533936543] [2022-01-28 14:57:39,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533936543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:39,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951240140] [2022-01-28 14:57:39,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:39,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:39,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:39,517 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) [2022-01-28 14:57:39,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-01-28 14:57:39,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:39,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:39,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:39,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:39,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:39,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:39,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:39,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:39,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:39,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:39,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:39,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:39,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:39,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:39,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:39,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:39,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:39,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951240140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:39,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:39,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:39,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279635781] [2022-01-28 14:57:39,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:39,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:39,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:39,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:39,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:39,990 INFO L87 Difference]: Start difference. First operand 617 states and 2002 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) [2022-01-28 14:57:40,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:40,308 INFO L93 Difference]: Finished difference Result 808 states and 2552 transitions. [2022-01-28 14:57:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:40,308 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 [2022-01-28 14:57:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:40,309 INFO L225 Difference]: With dead ends: 808 [2022-01-28 14:57:40,309 INFO L226 Difference]: Without dead ends: 787 [2022-01-28 14:57:40,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:57:40,310 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 47 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:40,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 175 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 481 Invalid, 0 Unknown, 175 Unchecked, 0.2s Time] [2022-01-28 14:57:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-28 14:57:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 619. [2022-01-28 14:57:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.2475728155339807) internal successors, (2007), 618 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2007 transitions. [2022-01-28 14:57:40,317 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2007 transitions. Word has length 21 [2022-01-28 14:57:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:40,317 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 2007 transitions. [2022-01-28 14:57:40,317 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) [2022-01-28 14:57:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2007 transitions. [2022-01-28 14:57:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:40,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:40,318 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:40,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Ended with exit code 0 [2022-01-28 14:57:40,518 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 [2022-01-28 14:57:40,518 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:40,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash 569100505, now seen corresponding path program 412 times [2022-01-28 14:57:40,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:40,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238808523] [2022-01-28 14:57:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:40,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:40,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:40,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238808523] [2022-01-28 14:57:40,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238808523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719919233] [2022-01-28 14:57:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:40,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:40,642 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) [2022-01-28 14:57:40,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-01-28 14:57:40,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:40,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:40,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:40,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:40,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:40,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:40,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:40,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:40,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:40,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:40,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:40,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:40,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:41,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:41,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:41,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:41,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:41,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719919233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:41,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:41,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:41,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805140108] [2022-01-28 14:57:41,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:41,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:41,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:41,075 INFO L87 Difference]: Start difference. First operand 619 states and 2007 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) [2022-01-28 14:57:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:41,491 INFO L93 Difference]: Finished difference Result 808 states and 2555 transitions. [2022-01-28 14:57:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:41,492 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 [2022-01-28 14:57:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:41,493 INFO L225 Difference]: With dead ends: 808 [2022-01-28 14:57:41,493 INFO L226 Difference]: Without dead ends: 787 [2022-01-28 14:57:41,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:57:41,493 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:41,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 206 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 733 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-01-28 14:57:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-28 14:57:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 619. [2022-01-28 14:57:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.2475728155339807) internal successors, (2007), 618 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2007 transitions. [2022-01-28 14:57:41,500 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2007 transitions. Word has length 21 [2022-01-28 14:57:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:41,500 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 2007 transitions. [2022-01-28 14:57:41,500 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) [2022-01-28 14:57:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2007 transitions. [2022-01-28 14:57:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:41,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:41,501 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] [2022-01-28 14:57:41,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-01-28 14:57:41,701 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 [2022-01-28 14:57:41,701 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2083661693, now seen corresponding path program 413 times [2022-01-28 14:57:41,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:41,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194159235] [2022-01-28 14:57:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:41,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:41,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:41,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194159235] [2022-01-28 14:57:41,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194159235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:41,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613866805] [2022-01-28 14:57:41,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:41,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:41,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:41,822 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) [2022-01-28 14:57:41,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-01-28 14:57:41,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:41,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:41,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:41,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:41,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:41,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:41,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:41,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:41,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:41,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:42,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:42,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:42,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:42,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:42,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:42,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:42,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:42,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613866805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:42,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:42,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:42,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491558866] [2022-01-28 14:57:42,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:42,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:42,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:42,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:42,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:42,280 INFO L87 Difference]: Start difference. First operand 619 states and 2007 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) [2022-01-28 14:57:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:42,625 INFO L93 Difference]: Finished difference Result 797 states and 2518 transitions. [2022-01-28 14:57:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:42,625 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 [2022-01-28 14:57:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:42,626 INFO L225 Difference]: With dead ends: 797 [2022-01-28 14:57:42,626 INFO L226 Difference]: Without dead ends: 782 [2022-01-28 14:57:42,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:57:42,626 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 97 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:42,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 145 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 523 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-28 14:57:42,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-28 14:57:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 616. [2022-01-28 14:57:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.2439024390243905) internal successors, (1995), 615 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1995 transitions. [2022-01-28 14:57:42,633 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1995 transitions. Word has length 21 [2022-01-28 14:57:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:42,633 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1995 transitions. [2022-01-28 14:57:42,633 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) [2022-01-28 14:57:42,633 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1995 transitions. [2022-01-28 14:57:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:42,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:42,634 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:42,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Ended with exit code 0 [2022-01-28 14:57:42,834 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 [2022-01-28 14:57:42,834 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash 76504743, now seen corresponding path program 414 times [2022-01-28 14:57:42,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:42,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767348534] [2022-01-28 14:57:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:42,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:42,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767348534] [2022-01-28 14:57:42,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767348534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:42,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139247767] [2022-01-28 14:57:42,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:42,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:42,952 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) [2022-01-28 14:57:42,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-01-28 14:57:42,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:57:42,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:42,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:42,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:43,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:43,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:43,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:43,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:43,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:43,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:43,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:43,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:43,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:43,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:43,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:43,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:43,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:43,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139247767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:43,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:43,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:43,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446611468] [2022-01-28 14:57:43,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:43,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:43,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:43,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:43,384 INFO L87 Difference]: Start difference. First operand 616 states and 1995 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) [2022-01-28 14:57:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:43,720 INFO L93 Difference]: Finished difference Result 756 states and 2403 transitions. [2022-01-28 14:57:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:57:43,721 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 [2022-01-28 14:57:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:43,722 INFO L225 Difference]: With dead ends: 756 [2022-01-28 14:57:43,722 INFO L226 Difference]: Without dead ends: 735 [2022-01-28 14:57:43,722 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 [2022-01-28 14:57:43,722 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:43,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 196 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 665 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-28 14:57:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-28 14:57:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 617. [2022-01-28 14:57:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 3.24025974025974) internal successors, (1996), 616 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1996 transitions. [2022-01-28 14:57:43,729 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1996 transitions. Word has length 21 [2022-01-28 14:57:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:43,729 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1996 transitions. [2022-01-28 14:57:43,729 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) [2022-01-28 14:57:43,729 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1996 transitions. [2022-01-28 14:57:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:43,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:43,730 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] [2022-01-28 14:57:43,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-01-28 14:57:43,930 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 [2022-01-28 14:57:43,930 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:43,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1447302341, now seen corresponding path program 415 times [2022-01-28 14:57:43,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:43,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315581600] [2022-01-28 14:57:43,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:43,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:44,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:44,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315581600] [2022-01-28 14:57:44,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315581600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:44,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822216296] [2022-01-28 14:57:44,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:44,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:44,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:44,044 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) [2022-01-28 14:57:44,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-01-28 14:57:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:44,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:44,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:44,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:44,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:44,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:44,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:44,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:44,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:44,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:44,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:44,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:44,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:44,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:44,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:44,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822216296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:44,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:44,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:44,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73762257] [2022-01-28 14:57:44,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:44,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:44,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:44,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:44,506 INFO L87 Difference]: Start difference. First operand 617 states and 1996 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) [2022-01-28 14:57:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:44,823 INFO L93 Difference]: Finished difference Result 803 states and 2511 transitions. [2022-01-28 14:57:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:44,823 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 [2022-01-28 14:57:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:44,824 INFO L225 Difference]: With dead ends: 803 [2022-01-28 14:57:44,824 INFO L226 Difference]: Without dead ends: 782 [2022-01-28 14:57:44,825 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 [2022-01-28 14:57:44,825 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:44,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 193 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 630 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-28 14:57:44,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-28 14:57:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 619. [2022-01-28 14:57:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.2297734627831716) internal successors, (1996), 618 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1996 transitions. [2022-01-28 14:57:44,832 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1996 transitions. Word has length 21 [2022-01-28 14:57:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:44,832 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1996 transitions. [2022-01-28 14:57:44,832 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) [2022-01-28 14:57:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1996 transitions. [2022-01-28 14:57:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:44,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:44,832 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:44,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:45,033 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 [2022-01-28 14:57:45,033 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1765342851, now seen corresponding path program 416 times [2022-01-28 14:57:45,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:45,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29055379] [2022-01-28 14:57:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:45,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:45,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29055379] [2022-01-28 14:57:45,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29055379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956579513] [2022-01-28 14:57:45,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:45,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:45,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:45,146 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) [2022-01-28 14:57:45,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-01-28 14:57:45,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:45,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:45,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:45,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:45,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:45,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:45,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:45,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:45,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:45,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:45,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:45,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:45,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:45,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:45,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:45,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:45,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956579513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:45,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:45,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:45,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918540766] [2022-01-28 14:57:45,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:45,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:45,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:45,630 INFO L87 Difference]: Start difference. First operand 619 states and 1996 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) [2022-01-28 14:57:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:45,908 INFO L93 Difference]: Finished difference Result 781 states and 2434 transitions. [2022-01-28 14:57:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:57:45,908 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 [2022-01-28 14:57:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:45,910 INFO L225 Difference]: With dead ends: 781 [2022-01-28 14:57:45,910 INFO L226 Difference]: Without dead ends: 772 [2022-01-28 14:57:45,910 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 [2022-01-28 14:57:45,910 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:45,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 145 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 495 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-01-28 14:57:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-28 14:57:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 616. [2022-01-28 14:57:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 3.2308943089430895) internal successors, (1987), 615 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1987 transitions. [2022-01-28 14:57:45,917 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1987 transitions. Word has length 21 [2022-01-28 14:57:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:45,917 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1987 transitions. [2022-01-28 14:57:45,917 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) [2022-01-28 14:57:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1987 transitions. [2022-01-28 14:57:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:45,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:45,918 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:45,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Ended with exit code 0 [2022-01-28 14:57:46,118 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 [2022-01-28 14:57:46,118 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1178427249, now seen corresponding path program 417 times [2022-01-28 14:57:46,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:46,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543575334] [2022-01-28 14:57:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:46,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:46,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:46,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543575334] [2022-01-28 14:57:46,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543575334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:46,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143539505] [2022-01-28 14:57:46,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:46,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:46,228 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) [2022-01-28 14:57:46,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-01-28 14:57:46,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:46,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:46,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:57:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:46,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:46,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:46,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:46,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:46,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:46,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:46,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:46,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:46,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:46,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:46,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:46,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:46,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:46,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143539505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:46,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:46,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:46,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928501882] [2022-01-28 14:57:46,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:46,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:46,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:46,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:46,809 INFO L87 Difference]: Start difference. First operand 616 states and 1987 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) [2022-01-28 14:57:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:47,263 INFO L93 Difference]: Finished difference Result 922 states and 2850 transitions. [2022-01-28 14:57:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:57:47,263 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 [2022-01-28 14:57:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:47,270 INFO L225 Difference]: With dead ends: 922 [2022-01-28 14:57:47,270 INFO L226 Difference]: Without dead ends: 865 [2022-01-28 14:57:47,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:57:47,270 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:47,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 221 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 709 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-01-28 14:57:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-01-28 14:57:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 632. [2022-01-28 14:57:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.2218700475435815) internal successors, (2033), 631 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2033 transitions. [2022-01-28 14:57:47,278 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2033 transitions. Word has length 21 [2022-01-28 14:57:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:47,278 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 2033 transitions. [2022-01-28 14:57:47,278 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) [2022-01-28 14:57:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2033 transitions. [2022-01-28 14:57:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:47,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:47,278 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:47,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Ended with exit code 0 [2022-01-28 14:57:47,479 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 [2022-01-28 14:57:47,479 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:47,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1853809177, now seen corresponding path program 418 times [2022-01-28 14:57:47,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:47,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138610933] [2022-01-28 14:57:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:47,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:47,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:47,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138610933] [2022-01-28 14:57:47,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138610933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:47,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70625795] [2022-01-28 14:57:47,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:47,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:47,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:47,591 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) [2022-01-28 14:57:47,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-01-28 14:57:47,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:47,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:47,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:47,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:47,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:47,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:47,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:47,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:47,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:57:47,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:47,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:47,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:47,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:48,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:48,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:57:48,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:48,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:57:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:48,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70625795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:48,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:48,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:57:48,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121780039] [2022-01-28 14:57:48,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:48,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:57:48,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:57:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:57:48,100 INFO L87 Difference]: Start difference. First operand 632 states and 2033 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) [2022-01-28 14:57:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:48,351 INFO L93 Difference]: Finished difference Result 806 states and 2492 transitions. [2022-01-28 14:57:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:57:48,351 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 [2022-01-28 14:57:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:48,352 INFO L225 Difference]: With dead ends: 806 [2022-01-28 14:57:48,352 INFO L226 Difference]: Without dead ends: 800 [2022-01-28 14:57:48,353 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 [2022-01-28 14:57:48,353 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:48,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 143 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 419 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-01-28 14:57:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-01-28 14:57:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 624. [2022-01-28 14:57:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 3.229534510433387) internal successors, (2012), 623 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2012 transitions. [2022-01-28 14:57:48,360 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2012 transitions. Word has length 21 [2022-01-28 14:57:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:48,360 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 2012 transitions. [2022-01-28 14:57:48,360 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) [2022-01-28 14:57:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2012 transitions. [2022-01-28 14:57:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:48,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:48,360 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:48,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Ended with exit code 0 [2022-01-28 14:57:48,561 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 [2022-01-28 14:57:48,561 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash -337042348, now seen corresponding path program 419 times [2022-01-28 14:57:48,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:48,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047851550] [2022-01-28 14:57:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:48,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:48,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047851550] [2022-01-28 14:57:48,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047851550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389926313] [2022-01-28 14:57:48,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:48,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:48,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:48,653 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) [2022-01-28 14:57:48,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-01-28 14:57:48,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:57:48,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:48,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:57:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:48,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:48,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:57:48,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:57:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:48,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:49,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:49,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:49,189 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:57:49,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:49,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389926313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:49,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:49,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-28 14:57:49,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390959300] [2022-01-28 14:57:49,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:49,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:57:49,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:49,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:57:49,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:57:49,195 INFO L87 Difference]: Start difference. First operand 624 states and 2012 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:50,764 INFO L93 Difference]: Finished difference Result 1466 states and 4476 transitions. [2022-01-28 14:57:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-28 14:57:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:57:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:50,767 INFO L225 Difference]: With dead ends: 1466 [2022-01-28 14:57:50,767 INFO L226 Difference]: Without dead ends: 1409 [2022-01-28 14:57:50,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=582, Invalid=2840, Unknown=0, NotChecked=0, Total=3422 [2022-01-28 14:57:50,767 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 343 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:50,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 310 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:57:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-01-28 14:57:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 634. [2022-01-28 14:57:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 3.244865718799368) internal successors, (2054), 633 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 2054 transitions. [2022-01-28 14:57:50,778 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 2054 transitions. Word has length 21 [2022-01-28 14:57:50,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:50,778 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 2054 transitions. [2022-01-28 14:57:50,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 2054 transitions. [2022-01-28 14:57:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:50,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:50,779 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:50,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Ended with exit code 0 [2022-01-28 14:57:50,979 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 [2022-01-28 14:57:50,979 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1932434187, now seen corresponding path program 420 times [2022-01-28 14:57:50,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:50,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106879760] [2022-01-28 14:57:50,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:50,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:51,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:51,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106879760] [2022-01-28 14:57:51,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106879760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145482495] [2022-01-28 14:57:51,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:51,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:51,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:51,075 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) [2022-01-28 14:57:51,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-01-28 14:57:51,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:57:51,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:51,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:51,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:51,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:57:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:51,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:51,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:51,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:51,420 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:57:51,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:51,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145482495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:51,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:51,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:57:51,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990664706] [2022-01-28 14:57:51,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:51,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:57:51,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:57:51,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:57:51,425 INFO L87 Difference]: Start difference. First operand 634 states and 2054 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) [2022-01-28 14:57:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:51,917 INFO L93 Difference]: Finished difference Result 1119 states and 3485 transitions. [2022-01-28 14:57:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:57:51,917 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 [2022-01-28 14:57:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:51,919 INFO L225 Difference]: With dead ends: 1119 [2022-01-28 14:57:51,919 INFO L226 Difference]: Without dead ends: 1080 [2022-01-28 14:57:51,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:57:51,920 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 185 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:51,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 226 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:57:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-01-28 14:57:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 638. [2022-01-28 14:57:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 3.241758241758242) internal successors, (2065), 637 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 2065 transitions. [2022-01-28 14:57:51,928 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 2065 transitions. Word has length 21 [2022-01-28 14:57:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:51,928 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 2065 transitions. [2022-01-28 14:57:51,928 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) [2022-01-28 14:57:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 2065 transitions. [2022-01-28 14:57:51,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:51,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:51,929 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:51,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Ended with exit code 0 [2022-01-28 14:57:52,129 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 [2022-01-28 14:57:52,129 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2015224756, now seen corresponding path program 421 times [2022-01-28 14:57:52,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:52,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790735072] [2022-01-28 14:57:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:52,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:52,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:52,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790735072] [2022-01-28 14:57:52,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790735072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:52,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521517340] [2022-01-28 14:57:52,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:52,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:52,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:52,233 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) [2022-01-28 14:57:52,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-01-28 14:57:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:52,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:52,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:52,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:52,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:52,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:52,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:52,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:52,572 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:57:52,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:57:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:52,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521517340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:52,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:52,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:57:52,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256218644] [2022-01-28 14:57:52,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:52,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:52,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:52,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:52,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:52,577 INFO L87 Difference]: Start difference. First operand 638 states and 2065 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) [2022-01-28 14:57:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:53,608 INFO L93 Difference]: Finished difference Result 1273 states and 3948 transitions. [2022-01-28 14:57:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 14:57:53,608 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 [2022-01-28 14:57:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:53,610 INFO L225 Difference]: With dead ends: 1273 [2022-01-28 14:57:53,610 INFO L226 Difference]: Without dead ends: 1254 [2022-01-28 14:57:53,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=1878, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 14:57:53,610 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 163 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:53,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 376 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:57:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-01-28 14:57:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 650. [2022-01-28 14:57:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.2496147919876734) internal successors, (2109), 649 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2109 transitions. [2022-01-28 14:57:53,620 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2109 transitions. Word has length 21 [2022-01-28 14:57:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:53,620 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 2109 transitions. [2022-01-28 14:57:53,620 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) [2022-01-28 14:57:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2109 transitions. [2022-01-28 14:57:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:53,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:53,621 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:53,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:53,821 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 [2022-01-28 14:57:53,821 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1017161556, now seen corresponding path program 422 times [2022-01-28 14:57:53,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:53,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280356579] [2022-01-28 14:57:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:53,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:53,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:53,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280356579] [2022-01-28 14:57:53,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280356579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:53,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307652639] [2022-01-28 14:57:53,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:57:53,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:53,921 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) [2022-01-28 14:57:53,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-01-28 14:57:53,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:57:53,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:53,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:53,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:53,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:54,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:57:54,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:57:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:54,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:54,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:54,273 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:57:54,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:57:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:54,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307652639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:54,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:54,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:57:54,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797592159] [2022-01-28 14:57:54,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:54,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:57:54,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:57:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:54,278 INFO L87 Difference]: Start difference. First operand 650 states and 2109 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) [2022-01-28 14:57:55,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:55,327 INFO L93 Difference]: Finished difference Result 1335 states and 4122 transitions. [2022-01-28 14:57:55,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-28 14:57:55,327 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 [2022-01-28 14:57:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:55,329 INFO L225 Difference]: With dead ends: 1335 [2022-01-28 14:57:55,329 INFO L226 Difference]: Without dead ends: 1312 [2022-01-28 14:57:55,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=444, Invalid=2106, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 14:57:55,329 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 242 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:55,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 302 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:57:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2022-01-28 14:57:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 653. [2022-01-28 14:57:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.2592024539877302) internal successors, (2125), 652 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2125 transitions. [2022-01-28 14:57:55,339 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2125 transitions. Word has length 21 [2022-01-28 14:57:55,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:55,339 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 2125 transitions. [2022-01-28 14:57:55,339 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) [2022-01-28 14:57:55,339 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2125 transitions. [2022-01-28 14:57:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:55,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:55,340 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] [2022-01-28 14:57:55,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Ended with exit code 0 [2022-01-28 14:57:55,540 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 [2022-01-28 14:57:55,540 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:55,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1035032231, now seen corresponding path program 423 times [2022-01-28 14:57:55,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:55,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294107290] [2022-01-28 14:57:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:55,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:55,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294107290] [2022-01-28 14:57:55,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294107290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:55,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805487810] [2022-01-28 14:57:55,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:57:55,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:55,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:55,614 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) [2022-01-28 14:57:55,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-01-28 14:57:55,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:57:55,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:55,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:55,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:55,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:55,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:55,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:55,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:55,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:55,851 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:57:55,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:57:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:55,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805487810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:55,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:55,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:57:55,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757717930] [2022-01-28 14:57:55,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:55,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:57:55,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:55,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:57:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:57:55,857 INFO L87 Difference]: Start difference. First operand 653 states and 2125 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:57:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:56,145 INFO L93 Difference]: Finished difference Result 1158 states and 3634 transitions. [2022-01-28 14:57:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:57:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 [2022-01-28 14:57:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:56,147 INFO L225 Difference]: With dead ends: 1158 [2022-01-28 14:57:56,147 INFO L226 Difference]: Without dead ends: 1136 [2022-01-28 14:57:56,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:56,148 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 100 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:56,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 178 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:57:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-01-28 14:57:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 659. [2022-01-28 14:57:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 3.2598784194528876) internal successors, (2145), 658 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 2145 transitions. [2022-01-28 14:57:56,157 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 2145 transitions. Word has length 21 [2022-01-28 14:57:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:56,157 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 2145 transitions. [2022-01-28 14:57:56,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:57:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 2145 transitions. [2022-01-28 14:57:56,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:56,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:56,158 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:56,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Ended with exit code 0 [2022-01-28 14:57:56,358 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 [2022-01-28 14:57:56,358 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:56,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1175992493, now seen corresponding path program 424 times [2022-01-28 14:57:56,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:56,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007649774] [2022-01-28 14:57:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:56,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:56,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:56,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007649774] [2022-01-28 14:57:56,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007649774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:56,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870480604] [2022-01-28 14:57:56,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:57:56,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:56,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:56,438 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) [2022-01-28 14:57:56,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-01-28 14:57:56,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:57:56,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:56,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:56,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:56,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:56,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:56,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:56,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:56,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:56,689 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:57:56,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:57:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:56,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870480604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:56,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:56,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:57:56,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361697061] [2022-01-28 14:57:56,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:56,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:57:56,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:57:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:57:56,694 INFO L87 Difference]: Start difference. First operand 659 states and 2145 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:57:56,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:56,945 INFO L93 Difference]: Finished difference Result 1116 states and 3526 transitions. [2022-01-28 14:57:56,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:57:56,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 [2022-01-28 14:57:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:56,947 INFO L225 Difference]: With dead ends: 1116 [2022-01-28 14:57:56,947 INFO L226 Difference]: Without dead ends: 1094 [2022-01-28 14:57:56,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:56,947 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:56,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 147 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:57:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-01-28 14:57:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 662. [2022-01-28 14:57:56,955 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) [2022-01-28 14:57:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2153 transitions. [2022-01-28 14:57:56,956 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2153 transitions. Word has length 21 [2022-01-28 14:57:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:56,956 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 2153 transitions. [2022-01-28 14:57:56,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:57:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2153 transitions. [2022-01-28 14:57:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:56,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:56,957 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:56,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-01-28 14:57:57,157 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 [2022-01-28 14:57:57,158 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:57,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:57,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1106489785, now seen corresponding path program 425 times [2022-01-28 14:57:57,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:57,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156801151] [2022-01-28 14:57:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:57,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:57,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:57,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156801151] [2022-01-28 14:57:57,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156801151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:57,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196719253] [2022-01-28 14:57:57,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:57:57,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:57,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:57,242 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) [2022-01-28 14:57:57,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-01-28 14:57:57,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:57:57,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:57,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:57,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:57,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:57:57,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:57:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:57,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:57,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:57,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:57:57,507 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:57:57,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:57:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:57,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196719253] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:57,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:57,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:57:57,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706951302] [2022-01-28 14:57:57,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:57,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:57:57,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:57:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:57:57,512 INFO L87 Difference]: Start difference. First operand 662 states and 2153 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:57:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:57,775 INFO L93 Difference]: Finished difference Result 1119 states and 3528 transitions. [2022-01-28 14:57:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:57:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 [2022-01-28 14:57:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:57,777 INFO L225 Difference]: With dead ends: 1119 [2022-01-28 14:57:57,777 INFO L226 Difference]: Without dead ends: 1090 [2022-01-28 14:57:57,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:57:57,777 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:57,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 156 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:57:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-01-28 14:57:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 654. [2022-01-28 14:57:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 3.2557427258805514) internal successors, (2126), 653 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2126 transitions. [2022-01-28 14:57:57,785 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2126 transitions. Word has length 21 [2022-01-28 14:57:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:57,785 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 2126 transitions. [2022-01-28 14:57:57,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:57:57,785 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2126 transitions. [2022-01-28 14:57:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:57,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:57,786 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] [2022-01-28 14:57:57,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Forceful destruction successful, exit code 0 [2022-01-28 14:57:57,986 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 [2022-01-28 14:57:57,987 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:57,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:57,987 INFO L85 PathProgramCache]: Analyzing trace with hash 351967838, now seen corresponding path program 426 times [2022-01-28 14:57:57,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:57,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796893575] [2022-01-28 14:57:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:57,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:58,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:58,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796893575] [2022-01-28 14:57:58,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796893575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:58,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008719630] [2022-01-28 14:57:58,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:57:58,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:58,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:58,074 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) [2022-01-28 14:57:58,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-01-28 14:57:58,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:57:58,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:57:58,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:58,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:57:58,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:58,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:58,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:58,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:58,354 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:57:58,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:57:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:58,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008719630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:58,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:58,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-28 14:57:58,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019088720] [2022-01-28 14:57:58,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:58,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:57:58,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:57:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:57:58,359 INFO L87 Difference]: Start difference. First operand 654 states and 2126 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) [2022-01-28 14:57:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:57:59,324 INFO L93 Difference]: Finished difference Result 1154 states and 3565 transitions. [2022-01-28 14:57:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 14:57:59,324 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 [2022-01-28 14:57:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:57:59,326 INFO L225 Difference]: With dead ends: 1154 [2022-01-28 14:57:59,326 INFO L226 Difference]: Without dead ends: 1135 [2022-01-28 14:57:59,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 14:57:59,326 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 183 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:57:59,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 305 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:57:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-01-28 14:57:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 662. [2022-01-28 14:57:59,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.252647503782148) internal successors, (2150), 661 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:57:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2150 transitions. [2022-01-28 14:57:59,335 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2150 transitions. Word has length 21 [2022-01-28 14:57:59,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:57:59,335 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 2150 transitions. [2022-01-28 14:57:59,335 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) [2022-01-28 14:57:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2150 transitions. [2022-01-28 14:57:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:57:59,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:57:59,336 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:57:59,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Ended with exit code 0 [2022-01-28 14:57:59,536 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 [2022-01-28 14:57:59,536 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:57:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:57:59,537 INFO L85 PathProgramCache]: Analyzing trace with hash 423425392, now seen corresponding path program 427 times [2022-01-28 14:57:59,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:57:59,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275908922] [2022-01-28 14:57:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:57:59,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:57:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:59,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:57:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275908922] [2022-01-28 14:57:59,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275908922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:57:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031033320] [2022-01-28 14:57:59,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:57:59,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:57:59,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:57:59,629 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) [2022-01-28 14:57:59,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-01-28 14:57:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:57:59,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:57:59,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:57:59,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:57:59,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:57:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:59,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:57:59,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:57:59,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:57:59,951 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:57:59,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:57:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:57:59,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031033320] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:57:59,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:57:59,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-28 14:57:59,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116015291] [2022-01-28 14:57:59,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:57:59,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:57:59,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:57:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:57:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:57:59,957 INFO L87 Difference]: Start difference. First operand 662 states and 2150 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) [2022-01-28 14:58:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:00,368 INFO L93 Difference]: Finished difference Result 896 states and 2824 transitions. [2022-01-28 14:58:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:58:00,368 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 [2022-01-28 14:58:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:00,369 INFO L225 Difference]: With dead ends: 896 [2022-01-28 14:58:00,369 INFO L226 Difference]: Without dead ends: 877 [2022-01-28 14:58:00,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-01-28 14:58:00,370 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:00,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 241 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-01-28 14:58:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 659. [2022-01-28 14:58:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 3.25531914893617) internal successors, (2142), 658 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 2142 transitions. [2022-01-28 14:58:00,377 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 2142 transitions. Word has length 21 [2022-01-28 14:58:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:00,377 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 2142 transitions. [2022-01-28 14:58:00,377 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) [2022-01-28 14:58:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 2142 transitions. [2022-01-28 14:58:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:00,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:00,378 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] [2022-01-28 14:58:00,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:00,578 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 [2022-01-28 14:58:00,579 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:00,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1857633361, now seen corresponding path program 428 times [2022-01-28 14:58:00,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:00,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972289802] [2022-01-28 14:58:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:00,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:00,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:00,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972289802] [2022-01-28 14:58:00,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972289802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:00,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277083495] [2022-01-28 14:58:00,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:00,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:00,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:00,672 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) [2022-01-28 14:58:00,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-01-28 14:58:00,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:00,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:00,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:00,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:00,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:00,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:00,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:00,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:01,021 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:01,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:01,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277083495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:01,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:01,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:58:01,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115432162] [2022-01-28 14:58:01,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:01,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:58:01,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:01,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:58:01,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:01,027 INFO L87 Difference]: Start difference. First operand 659 states and 2142 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) [2022-01-28 14:58:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:01,563 INFO L93 Difference]: Finished difference Result 1049 states and 3279 transitions. [2022-01-28 14:58:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:58:01,563 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 [2022-01-28 14:58:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:01,565 INFO L225 Difference]: With dead ends: 1049 [2022-01-28 14:58:01,565 INFO L226 Difference]: Without dead ends: 1016 [2022-01-28 14:58:01,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:58:01,565 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:01,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 280 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-28 14:58:01,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 666. [2022-01-28 14:58:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.2526315789473683) internal successors, (2163), 665 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2163 transitions. [2022-01-28 14:58:01,573 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2163 transitions. Word has length 21 [2022-01-28 14:58:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:01,573 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 2163 transitions. [2022-01-28 14:58:01,573 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) [2022-01-28 14:58:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2163 transitions. [2022-01-28 14:58:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:01,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:01,574 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:01,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Ended with exit code 0 [2022-01-28 14:58:01,774 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 [2022-01-28 14:58:01,775 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1684879143, now seen corresponding path program 429 times [2022-01-28 14:58:01,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:01,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795900122] [2022-01-28 14:58:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:01,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:01,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:01,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795900122] [2022-01-28 14:58:01,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795900122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:01,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325422054] [2022-01-28 14:58:01,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:01,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:01,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:01,855 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) [2022-01-28 14:58:01,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-01-28 14:58:01,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:58:01,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:01,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:01,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:01,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:02,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:02,109 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:02,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:02,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325422054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:02,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:02,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:58:02,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238103048] [2022-01-28 14:58:02,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:02,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:58:02,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:58:02,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:58:02,115 INFO L87 Difference]: Start difference. First operand 666 states and 2163 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:58:02,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:02,394 INFO L93 Difference]: Finished difference Result 926 states and 2923 transitions. [2022-01-28 14:58:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:58:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 [2022-01-28 14:58:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:02,396 INFO L225 Difference]: With dead ends: 926 [2022-01-28 14:58:02,396 INFO L226 Difference]: Without dead ends: 904 [2022-01-28 14:58:02,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:02,396 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:02,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:58:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-28 14:58:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 666. [2022-01-28 14:58:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.2526315789473683) internal successors, (2163), 665 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2163 transitions. [2022-01-28 14:58:02,403 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2163 transitions. Word has length 21 [2022-01-28 14:58:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:02,404 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 2163 transitions. [2022-01-28 14:58:02,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:58:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2163 transitions. [2022-01-28 14:58:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:02,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:02,404 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] [2022-01-28 14:58:02,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-01-28 14:58:02,605 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 [2022-01-28 14:58:02,605 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:02,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1824034133, now seen corresponding path program 430 times [2022-01-28 14:58:02,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:02,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40369176] [2022-01-28 14:58:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:02,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:02,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:02,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40369176] [2022-01-28 14:58:02,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40369176] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:02,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982959218] [2022-01-28 14:58:02,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:02,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:02,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:02,701 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) [2022-01-28 14:58:02,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-01-28 14:58:02,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:02,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:02,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:02,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:02,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:02,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:02,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:02,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:02,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:03,058 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:03,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:03,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982959218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:03,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:03,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:58:03,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965498780] [2022-01-28 14:58:03,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:03,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:58:03,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:03,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:58:03,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:03,064 INFO L87 Difference]: Start difference. First operand 666 states and 2163 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) [2022-01-28 14:58:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:03,649 INFO L93 Difference]: Finished difference Result 1084 states and 3374 transitions. [2022-01-28 14:58:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:03,649 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 [2022-01-28 14:58:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:03,651 INFO L225 Difference]: With dead ends: 1084 [2022-01-28 14:58:03,651 INFO L226 Difference]: Without dead ends: 1057 [2022-01-28 14:58:03,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:58:03,651 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 122 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:03,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 237 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-01-28 14:58:03,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 667. [2022-01-28 14:58:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.2567567567567566) internal successors, (2169), 666 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2169 transitions. [2022-01-28 14:58:03,659 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2169 transitions. Word has length 21 [2022-01-28 14:58:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:03,660 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 2169 transitions. [2022-01-28 14:58:03,660 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) [2022-01-28 14:58:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2169 transitions. [2022-01-28 14:58:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:03,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:03,660 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:03,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Ended with exit code 0 [2022-01-28 14:58:03,861 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 [2022-01-28 14:58:03,861 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:03,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:03,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1615376435, now seen corresponding path program 431 times [2022-01-28 14:58:03,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:03,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273574882] [2022-01-28 14:58:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:03,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:03,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:03,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273574882] [2022-01-28 14:58:03,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273574882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:03,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268706644] [2022-01-28 14:58:03,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:03,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:03,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:03,948 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) [2022-01-28 14:58:03,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-01-28 14:58:03,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:03,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:03,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:03,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:04,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:04,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:04,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:04,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:04,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:04,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:04,203 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:04,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:04,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268706644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:04,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:04,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:58:04,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248800090] [2022-01-28 14:58:04,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:04,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:58:04,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:04,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:58:04,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:58:04,209 INFO L87 Difference]: Start difference. First operand 667 states and 2169 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:58:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:04,456 INFO L93 Difference]: Finished difference Result 976 states and 3069 transitions. [2022-01-28 14:58:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:58:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 [2022-01-28 14:58:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:04,457 INFO L225 Difference]: With dead ends: 976 [2022-01-28 14:58:04,457 INFO L226 Difference]: Without dead ends: 947 [2022-01-28 14:58:04,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:04,457 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:04,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 152 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:58:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-01-28 14:58:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 662. [2022-01-28 14:58:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.252647503782148) internal successors, (2150), 661 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2150 transitions. [2022-01-28 14:58:04,465 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2150 transitions. Word has length 21 [2022-01-28 14:58:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:04,465 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 2150 transitions. [2022-01-28 14:58:04,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:58:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2150 transitions. [2022-01-28 14:58:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:04,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:04,466 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] [2022-01-28 14:58:04,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:04,666 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 [2022-01-28 14:58:04,667 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash 282749987, now seen corresponding path program 432 times [2022-01-28 14:58:04,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:04,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90305012] [2022-01-28 14:58:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:04,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:04,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90305012] [2022-01-28 14:58:04,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90305012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786012101] [2022-01-28 14:58:04,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:04,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:04,759 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) [2022-01-28 14:58:04,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-01-28 14:58:04,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:58:04,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:04,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:04,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:04,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:04,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:04,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:04,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:05,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:05,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:05,121 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:05,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:05,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786012101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:05,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:05,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:58:05,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314808413] [2022-01-28 14:58:05,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:05,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:58:05,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:58:05,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:05,126 INFO L87 Difference]: Start difference. First operand 662 states and 2150 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) [2022-01-28 14:58:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:05,635 INFO L93 Difference]: Finished difference Result 1065 states and 3315 transitions. [2022-01-28 14:58:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:05,636 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 [2022-01-28 14:58:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:05,637 INFO L225 Difference]: With dead ends: 1065 [2022-01-28 14:58:05,637 INFO L226 Difference]: Without dead ends: 1038 [2022-01-28 14:58:05,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:58:05,638 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:05,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 218 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-01-28 14:58:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 674. [2022-01-28 14:58:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2719167904903417) internal successors, (2202), 673 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2202 transitions. [2022-01-28 14:58:05,646 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2202 transitions. Word has length 21 [2022-01-28 14:58:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:05,646 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 2202 transitions. [2022-01-28 14:58:05,646 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) [2022-01-28 14:58:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2202 transitions. [2022-01-28 14:58:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:05,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:05,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:05,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Ended with exit code 0 [2022-01-28 14:58:05,847 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 [2022-01-28 14:58:05,848 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash -572806741, now seen corresponding path program 433 times [2022-01-28 14:58:05,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:05,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934299874] [2022-01-28 14:58:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:05,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:05,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:05,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934299874] [2022-01-28 14:58:05,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934299874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:05,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54990583] [2022-01-28 14:58:05,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:05,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:05,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:05,926 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) [2022-01-28 14:58:05,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-01-28 14:58:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:05,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:05,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:05,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:06,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:06,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:06,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:06,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:06,200 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:06,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:06,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54990583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:06,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:06,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:58:06,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839272529] [2022-01-28 14:58:06,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:06,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:58:06,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:06,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:58:06,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:58:06,205 INFO L87 Difference]: Start difference. First operand 674 states and 2202 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) [2022-01-28 14:58:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:06,530 INFO L93 Difference]: Finished difference Result 947 states and 2993 transitions. [2022-01-28 14:58:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:58:06,530 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 [2022-01-28 14:58:06,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:06,531 INFO L225 Difference]: With dead ends: 947 [2022-01-28 14:58:06,531 INFO L226 Difference]: Without dead ends: 911 [2022-01-28 14:58:06,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:06,532 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 82 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:06,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 195 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-01-28 14:58:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 675. [2022-01-28 14:58:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 3.271513353115727) internal successors, (2205), 674 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:06,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2205 transitions. [2022-01-28 14:58:06,539 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2205 transitions. Word has length 21 [2022-01-28 14:58:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:06,539 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 2205 transitions. [2022-01-28 14:58:06,539 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) [2022-01-28 14:58:06,540 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2205 transitions. [2022-01-28 14:58:06,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:06,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:06,540 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:06,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Ended with exit code 0 [2022-01-28 14:58:06,740 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 [2022-01-28 14:58:06,741 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash 213247279, now seen corresponding path program 434 times [2022-01-28 14:58:06,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:06,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530675509] [2022-01-28 14:58:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:06,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:06,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530675509] [2022-01-28 14:58:06,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530675509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164546247] [2022-01-28 14:58:06,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:06,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:06,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:06,830 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) [2022-01-28 14:58:06,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-01-28 14:58:06,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:06,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:06,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:06,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:06,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:06,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:06,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:07,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:07,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:07,191 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:07,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:07,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164546247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:07,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:07,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:07,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508042561] [2022-01-28 14:58:07,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:07,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:07,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:07,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:07,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:07,196 INFO L87 Difference]: Start difference. First operand 675 states and 2205 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) [2022-01-28 14:58:07,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:07,627 INFO L93 Difference]: Finished difference Result 989 states and 3096 transitions. [2022-01-28 14:58:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:58:07,627 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 [2022-01-28 14:58:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:07,629 INFO L225 Difference]: With dead ends: 989 [2022-01-28 14:58:07,629 INFO L226 Difference]: Without dead ends: 968 [2022-01-28 14:58:07,629 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 [2022-01-28 14:58:07,629 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:07,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 227 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-01-28 14:58:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 658. [2022-01-28 14:58:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.2648401826484017) internal successors, (2145), 657 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2145 transitions. [2022-01-28 14:58:07,637 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2145 transitions. Word has length 21 [2022-01-28 14:58:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:07,637 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2145 transitions. [2022-01-28 14:58:07,637 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) [2022-01-28 14:58:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2145 transitions. [2022-01-28 14:58:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:07,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:07,638 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:07,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Ended with exit code 0 [2022-01-28 14:58:07,838 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 [2022-01-28 14:58:07,838 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash 126319120, now seen corresponding path program 435 times [2022-01-28 14:58:07,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:07,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443665934] [2022-01-28 14:58:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:07,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:07,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:07,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443665934] [2022-01-28 14:58:07,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443665934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:07,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503624786] [2022-01-28 14:58:07,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:07,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:07,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:07,947 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) [2022-01-28 14:58:07,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-01-28 14:58:07,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:58:07,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:07,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:07,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:08,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:08,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:08,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:08,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:08,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:08,338 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:08,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:08,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503624786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:08,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:08,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:58:08,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942468402] [2022-01-28 14:58:08,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:08,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:08,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:08,346 INFO L87 Difference]: Start difference. First operand 658 states and 2145 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) [2022-01-28 14:58:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:08,797 INFO L93 Difference]: Finished difference Result 918 states and 2900 transitions. [2022-01-28 14:58:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:58:08,797 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 [2022-01-28 14:58:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:08,799 INFO L225 Difference]: With dead ends: 918 [2022-01-28 14:58:08,799 INFO L226 Difference]: Without dead ends: 899 [2022-01-28 14:58:08,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:58:08,799 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:08,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 275 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:08,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-01-28 14:58:08,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 654. [2022-01-28 14:58:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 3.2664624808575806) internal successors, (2133), 653 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2133 transitions. [2022-01-28 14:58:08,807 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2133 transitions. Word has length 21 [2022-01-28 14:58:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:08,807 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 2133 transitions. [2022-01-28 14:58:08,807 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) [2022-01-28 14:58:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2133 transitions. [2022-01-28 14:58:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:08,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:08,808 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] [2022-01-28 14:58:08,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Ended with exit code 0 [2022-01-28 14:58:09,008 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 [2022-01-28 14:58:09,008 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:09,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1672511728, now seen corresponding path program 436 times [2022-01-28 14:58:09,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:09,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634832834] [2022-01-28 14:58:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:09,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:09,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:09,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634832834] [2022-01-28 14:58:09,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634832834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:09,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835552891] [2022-01-28 14:58:09,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:09,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:09,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:09,111 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) [2022-01-28 14:58:09,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-01-28 14:58:09,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:09,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:09,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:09,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:09,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:09,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:09,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:09,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:09,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:09,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:58:09,504 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:09,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:09,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835552891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:09,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:09,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:09,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364541733] [2022-01-28 14:58:09,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:09,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:09,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:09,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:09,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:09,513 INFO L87 Difference]: Start difference. First operand 654 states and 2133 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) [2022-01-28 14:58:10,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:10,019 INFO L93 Difference]: Finished difference Result 1025 states and 3202 transitions. [2022-01-28 14:58:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:58:10,020 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 [2022-01-28 14:58:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:10,022 INFO L225 Difference]: With dead ends: 1025 [2022-01-28 14:58:10,022 INFO L226 Difference]: Without dead ends: 1002 [2022-01-28 14:58:10,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:58:10,022 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:10,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 220 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-01-28 14:58:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 658. [2022-01-28 14:58:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.263318112633181) internal successors, (2144), 657 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2144 transitions. [2022-01-28 14:58:10,031 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2144 transitions. Word has length 21 [2022-01-28 14:58:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:10,031 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2144 transitions. [2022-01-28 14:58:10,031 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) [2022-01-28 14:58:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2144 transitions. [2022-01-28 14:58:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:10,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:10,032 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:10,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Ended with exit code 0 [2022-01-28 14:58:10,232 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 [2022-01-28 14:58:10,232 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:10,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1569001574, now seen corresponding path program 437 times [2022-01-28 14:58:10,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:10,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720691452] [2022-01-28 14:58:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:10,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:10,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:10,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720691452] [2022-01-28 14:58:10,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720691452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:10,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973360992] [2022-01-28 14:58:10,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:10,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:10,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:10,347 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) [2022-01-28 14:58:10,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-01-28 14:58:10,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:58:10,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:10,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:58:10,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:10,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:10,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:10,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:10,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:10,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:10,870 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:10,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:10,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973360992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:10,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:10,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-28 14:58:10,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707241104] [2022-01-28 14:58:10,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:10,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:58:10,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:10,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:58:10,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:10,879 INFO L87 Difference]: Start difference. First operand 658 states and 2144 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:11,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:11,535 INFO L93 Difference]: Finished difference Result 1012 states and 3160 transitions. [2022-01-28 14:58:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:11,535 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:58:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:11,537 INFO L225 Difference]: With dead ends: 1012 [2022-01-28 14:58:11,537 INFO L226 Difference]: Without dead ends: 955 [2022-01-28 14:58:11,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:58:11,537 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 175 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:11,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 260 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-28 14:58:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 668. [2022-01-28 14:58:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 3.2758620689655173) internal successors, (2185), 667 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2185 transitions. [2022-01-28 14:58:11,545 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2185 transitions. Word has length 21 [2022-01-28 14:58:11,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:11,545 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 2185 transitions. [2022-01-28 14:58:11,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2185 transitions. [2022-01-28 14:58:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:11,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:11,546 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:11,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Ended with exit code 0 [2022-01-28 14:58:11,746 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 [2022-01-28 14:58:11,747 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:11,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1593667852, now seen corresponding path program 438 times [2022-01-28 14:58:11,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:11,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320716302] [2022-01-28 14:58:11,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:11,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:11,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:11,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320716302] [2022-01-28 14:58:11,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320716302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:11,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109214369] [2022-01-28 14:58:11,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:11,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:11,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:11,828 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) [2022-01-28 14:58:11,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-01-28 14:58:11,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:58:11,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:11,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:11,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:11,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:11,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:11,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:12,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:12,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:12,109 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:12,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:12,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109214369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:12,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:12,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-28 14:58:12,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188772389] [2022-01-28 14:58:12,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:12,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:58:12,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:12,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:58:12,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:58:12,116 INFO L87 Difference]: Start difference. First operand 668 states and 2185 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) [2022-01-28 14:58:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:12,985 INFO L93 Difference]: Finished difference Result 1303 states and 4005 transitions. [2022-01-28 14:58:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:58:12,985 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 [2022-01-28 14:58:12,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:12,987 INFO L225 Difference]: With dead ends: 1303 [2022-01-28 14:58:12,987 INFO L226 Difference]: Without dead ends: 1284 [2022-01-28 14:58:12,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 14:58:12,987 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 182 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:12,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 270 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-01-28 14:58:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 668. [2022-01-28 14:58:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 3.2638680659670163) internal successors, (2177), 667 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2177 transitions. [2022-01-28 14:58:12,997 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2177 transitions. Word has length 21 [2022-01-28 14:58:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:12,997 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 2177 transitions. [2022-01-28 14:58:12,997 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) [2022-01-28 14:58:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2177 transitions. [2022-01-28 14:58:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:12,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:12,998 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:13,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Ended with exit code 0 [2022-01-28 14:58:13,198 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 [2022-01-28 14:58:13,198 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1665125406, now seen corresponding path program 439 times [2022-01-28 14:58:13,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:13,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641134660] [2022-01-28 14:58:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:13,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:13,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:13,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641134660] [2022-01-28 14:58:13,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641134660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:13,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042964453] [2022-01-28 14:58:13,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:13,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:13,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:13,287 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) [2022-01-28 14:58:13,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-01-28 14:58:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:13,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:13,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:13,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:13,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:13,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:13,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:13,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:13,577 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:13,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:13,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042964453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:13,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:13,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-28 14:58:13,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756165320] [2022-01-28 14:58:13,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:13,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:58:13,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:58:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:58:13,583 INFO L87 Difference]: Start difference. First operand 668 states and 2177 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) [2022-01-28 14:58:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:13,979 INFO L93 Difference]: Finished difference Result 1055 states and 3290 transitions. [2022-01-28 14:58:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:58:13,979 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 [2022-01-28 14:58:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:13,980 INFO L225 Difference]: With dead ends: 1055 [2022-01-28 14:58:13,980 INFO L226 Difference]: Without dead ends: 1036 [2022-01-28 14:58:13,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:13,981 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:13,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 238 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-01-28 14:58:13,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 648. [2022-01-28 14:58:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.2596599690880987) internal successors, (2109), 647 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2109 transitions. [2022-01-28 14:58:13,989 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2109 transitions. Word has length 21 [2022-01-28 14:58:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:13,989 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2109 transitions. [2022-01-28 14:58:13,989 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) [2022-01-28 14:58:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2109 transitions. [2022-01-28 14:58:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:13,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:13,990 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:14,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:14,190 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 [2022-01-28 14:58:14,190 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash 262586508, now seen corresponding path program 440 times [2022-01-28 14:58:14,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:14,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405968770] [2022-01-28 14:58:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:14,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:14,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405968770] [2022-01-28 14:58:14,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405968770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574130553] [2022-01-28 14:58:14,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:14,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:14,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:14,277 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) [2022-01-28 14:58:14,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-01-28 14:58:14,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:14,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:14,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:14,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:14,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:14,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:14,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:14,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:14,568 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:14,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:14,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574130553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:14,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:14,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-28 14:58:14,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091856782] [2022-01-28 14:58:14,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:14,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:58:14,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:14,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:58:14,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:58:14,573 INFO L87 Difference]: Start difference. First operand 648 states and 2109 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) [2022-01-28 14:58:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:15,079 INFO L93 Difference]: Finished difference Result 1056 states and 3297 transitions. [2022-01-28 14:58:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:15,079 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 [2022-01-28 14:58:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:15,080 INFO L225 Difference]: With dead ends: 1056 [2022-01-28 14:58:15,080 INFO L226 Difference]: Without dead ends: 1037 [2022-01-28 14:58:15,080 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 [2022-01-28 14:58:15,081 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 115 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:15,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 301 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-28 14:58:15,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 660. [2022-01-28 14:58:15,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 3.2579666160849774) internal successors, (2147), 659 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 2147 transitions. [2022-01-28 14:58:15,089 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 2147 transitions. Word has length 21 [2022-01-28 14:58:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:15,089 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 2147 transitions. [2022-01-28 14:58:15,089 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) [2022-01-28 14:58:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 2147 transitions. [2022-01-28 14:58:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:15,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:15,090 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] [2022-01-28 14:58:15,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Ended with exit code 0 [2022-01-28 14:58:15,290 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 [2022-01-28 14:58:15,290 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:15,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1953086960, now seen corresponding path program 441 times [2022-01-28 14:58:15,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:15,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289728748] [2022-01-28 14:58:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:15,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:15,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:15,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289728748] [2022-01-28 14:58:15,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289728748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:15,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5050150] [2022-01-28 14:58:15,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:15,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:15,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:15,387 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) [2022-01-28 14:58:15,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-01-28 14:58:15,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:58:15,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:15,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:15,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:15,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:15,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:15,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:15,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:15,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:15,663 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:15,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:15,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5050150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:15,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:15,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-28 14:58:15,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275118044] [2022-01-28 14:58:15,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:15,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:58:15,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:58:15,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:58:15,668 INFO L87 Difference]: Start difference. First operand 660 states and 2147 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) [2022-01-28 14:58:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:16,146 INFO L93 Difference]: Finished difference Result 1064 states and 3317 transitions. [2022-01-28 14:58:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:16,147 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 [2022-01-28 14:58:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:16,148 INFO L225 Difference]: With dead ends: 1064 [2022-01-28 14:58:16,148 INFO L226 Difference]: Without dead ends: 1045 [2022-01-28 14:58:16,148 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 [2022-01-28 14:58:16,148 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 111 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:16,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 260 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-01-28 14:58:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 659. [2022-01-28 14:58:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 3.25531914893617) internal successors, (2142), 658 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 2142 transitions. [2022-01-28 14:58:16,157 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 2142 transitions. Word has length 21 [2022-01-28 14:58:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:16,157 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 2142 transitions. [2022-01-28 14:58:16,157 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) [2022-01-28 14:58:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 2142 transitions. [2022-01-28 14:58:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:16,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:16,158 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:16,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Ended with exit code 0 [2022-01-28 14:58:16,358 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 [2022-01-28 14:58:16,358 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash 193083800, now seen corresponding path program 442 times [2022-01-28 14:58:16,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:16,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003320947] [2022-01-28 14:58:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:16,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:16,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003320947] [2022-01-28 14:58:16,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003320947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:16,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446523960] [2022-01-28 14:58:16,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:16,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:16,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:16,457 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) [2022-01-28 14:58:16,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-01-28 14:58:16,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:16,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:16,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:16,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:16,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:16,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:16,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:16,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:16,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:16,750 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:16,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:16,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446523960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:16,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:16,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-28 14:58:16,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021814095] [2022-01-28 14:58:16,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:16,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:58:16,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:16,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:58:16,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:58:16,756 INFO L87 Difference]: Start difference. First operand 659 states and 2142 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) [2022-01-28 14:58:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:17,138 INFO L93 Difference]: Finished difference Result 993 states and 3111 transitions. [2022-01-28 14:58:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:58:17,139 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 [2022-01-28 14:58:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:17,140 INFO L225 Difference]: With dead ends: 993 [2022-01-28 14:58:17,140 INFO L226 Difference]: Without dead ends: 974 [2022-01-28 14:58:17,140 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 [2022-01-28 14:58:17,141 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 109 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:17,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 225 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-01-28 14:58:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 655. [2022-01-28 14:58:17,148 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) [2022-01-28 14:58:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 2130 transitions. [2022-01-28 14:58:17,149 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 2130 transitions. Word has length 21 [2022-01-28 14:58:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:17,149 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 2130 transitions. [2022-01-28 14:58:17,149 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) [2022-01-28 14:58:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 2130 transitions. [2022-01-28 14:58:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:17,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:17,150 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:17,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Ended with exit code 0 [2022-01-28 14:58:17,350 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 [2022-01-28 14:58:17,350 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:17,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:17,350 INFO L85 PathProgramCache]: Analyzing trace with hash -901007788, now seen corresponding path program 443 times [2022-01-28 14:58:17,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:17,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272527913] [2022-01-28 14:58:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:17,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:17,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:17,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272527913] [2022-01-28 14:58:17,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272527913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:17,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196780457] [2022-01-28 14:58:17,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:17,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:17,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:17,436 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) [2022-01-28 14:58:17,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-01-28 14:58:17,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:58:17,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:17,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:58:17,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:17,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:17,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:17,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:17,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:17,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:17,811 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:17,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:17,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196780457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:17,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:17,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:58:17,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489527191] [2022-01-28 14:58:17,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:17,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:58:17,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:58:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:17,817 INFO L87 Difference]: Start difference. First operand 655 states and 2130 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) [2022-01-28 14:58:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:18,517 INFO L93 Difference]: Finished difference Result 1208 states and 3751 transitions. [2022-01-28 14:58:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:18,518 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 [2022-01-28 14:58:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:18,520 INFO L225 Difference]: With dead ends: 1208 [2022-01-28 14:58:18,520 INFO L226 Difference]: Without dead ends: 1151 [2022-01-28 14:58:18,520 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 [2022-01-28 14:58:18,520 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 201 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:18,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 292 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2022-01-28 14:58:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 661. [2022-01-28 14:58:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 3.2636363636363637) internal successors, (2154), 660 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 2154 transitions. [2022-01-28 14:58:18,534 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 2154 transitions. Word has length 21 [2022-01-28 14:58:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:18,535 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 2154 transitions. [2022-01-28 14:58:18,535 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) [2022-01-28 14:58:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 2154 transitions. [2022-01-28 14:58:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:18,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:18,535 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:18,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:18,736 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 [2022-01-28 14:58:18,736 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash -246282891, now seen corresponding path program 444 times [2022-01-28 14:58:18,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:18,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049898021] [2022-01-28 14:58:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:18,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:18,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049898021] [2022-01-28 14:58:18,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049898021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714850645] [2022-01-28 14:58:18,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:18,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:18,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:18,839 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) [2022-01-28 14:58:18,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-01-28 14:58:18,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:58:18,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:18,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:18,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:18,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:18,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:18,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:19,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:19,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:19,178 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:19,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714850645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:19,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:19,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:58:19,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169961255] [2022-01-28 14:58:19,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:19,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:58:19,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:58:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:58:19,183 INFO L87 Difference]: Start difference. First operand 661 states and 2154 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) [2022-01-28 14:58:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:19,756 INFO L93 Difference]: Finished difference Result 1192 states and 3702 transitions. [2022-01-28 14:58:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:19,756 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 [2022-01-28 14:58:19,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:19,758 INFO L225 Difference]: With dead ends: 1192 [2022-01-28 14:58:19,758 INFO L226 Difference]: Without dead ends: 1159 [2022-01-28 14:58:19,758 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 [2022-01-28 14:58:19,758 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:19,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 234 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:19,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-01-28 14:58:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 669. [2022-01-28 14:58:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2619760479041915) internal successors, (2179), 668 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2179 transitions. [2022-01-28 14:58:19,767 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2179 transitions. Word has length 21 [2022-01-28 14:58:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:19,767 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2179 transitions. [2022-01-28 14:58:19,767 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) [2022-01-28 14:58:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2179 transitions. [2022-01-28 14:58:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:19,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:19,768 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] [2022-01-28 14:58:19,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Ended with exit code 0 [2022-01-28 14:58:19,968 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 [2022-01-28 14:58:19,968 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:19,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash -998737683, now seen corresponding path program 445 times [2022-01-28 14:58:19,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:19,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540413757] [2022-01-28 14:58:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:19,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:20,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:20,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540413757] [2022-01-28 14:58:20,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540413757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:20,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589642580] [2022-01-28 14:58:20,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:20,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:20,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:20,043 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) [2022-01-28 14:58:20,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-01-28 14:58:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:20,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:20,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:20,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:20,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:20,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:20,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:20,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:20,285 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:20,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:20,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589642580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:20,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:20,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:58:20,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139999638] [2022-01-28 14:58:20,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:20,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:58:20,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:20,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:58:20,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:58:20,290 INFO L87 Difference]: Start difference. First operand 669 states and 2179 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:58:20,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:20,544 INFO L93 Difference]: Finished difference Result 963 states and 3033 transitions. [2022-01-28 14:58:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:58:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 [2022-01-28 14:58:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:20,546 INFO L225 Difference]: With dead ends: 963 [2022-01-28 14:58:20,546 INFO L226 Difference]: Without dead ends: 941 [2022-01-28 14:58:20,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:20,546 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:20,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 125 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:58:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-28 14:58:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 669. [2022-01-28 14:58:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2619760479041915) internal successors, (2179), 668 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2179 transitions. [2022-01-28 14:58:20,554 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2179 transitions. Word has length 21 [2022-01-28 14:58:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:20,554 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2179 transitions. [2022-01-28 14:58:20,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:58:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2179 transitions. [2022-01-28 14:58:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:20,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:20,555 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:20,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:20,755 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 [2022-01-28 14:58:20,755 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash -212683663, now seen corresponding path program 446 times [2022-01-28 14:58:20,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:20,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262793058] [2022-01-28 14:58:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:20,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:20,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:20,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262793058] [2022-01-28 14:58:20,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262793058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:20,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141693179] [2022-01-28 14:58:20,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:20,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:20,849 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) [2022-01-28 14:58:20,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-01-28 14:58:20,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:20,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:20,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:20,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:20,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:21,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:21,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:21,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:21,256 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:21,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:21,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141693179] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:21,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:21,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:58:21,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173239801] [2022-01-28 14:58:21,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:21,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:58:21,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:58:21,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:58:21,262 INFO L87 Difference]: Start difference. First operand 669 states and 2179 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) [2022-01-28 14:58:21,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:21,857 INFO L93 Difference]: Finished difference Result 1178 states and 3648 transitions. [2022-01-28 14:58:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:58:21,857 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 [2022-01-28 14:58:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:21,864 INFO L225 Difference]: With dead ends: 1178 [2022-01-28 14:58:21,865 INFO L226 Difference]: Without dead ends: 1151 [2022-01-28 14:58:21,865 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 [2022-01-28 14:58:21,865 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 148 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:21,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 229 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2022-01-28 14:58:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 669. [2022-01-28 14:58:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2619760479041915) internal successors, (2179), 668 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2179 transitions. [2022-01-28 14:58:21,876 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2179 transitions. Word has length 21 [2022-01-28 14:58:21,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:21,876 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2179 transitions. [2022-01-28 14:58:21,876 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) [2022-01-28 14:58:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2179 transitions. [2022-01-28 14:58:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:21,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:21,877 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:21,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Ended with exit code 0 [2022-01-28 14:58:22,077 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 [2022-01-28 14:58:22,077 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:22,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1068240391, now seen corresponding path program 447 times [2022-01-28 14:58:22,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:22,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423689742] [2022-01-28 14:58:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:22,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:22,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:22,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423689742] [2022-01-28 14:58:22,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423689742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:22,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530246729] [2022-01-28 14:58:22,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:22,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:22,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:22,158 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) [2022-01-28 14:58:22,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-01-28 14:58:22,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:58:22,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:22,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:22,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:22,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:22,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:22,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:22,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:22,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:22,400 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:22,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:22,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530246729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:22,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:22,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 14:58:22,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444894463] [2022-01-28 14:58:22,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:22,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:58:22,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:58:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:58:22,406 INFO L87 Difference]: Start difference. First operand 669 states and 2179 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:58:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:22,642 INFO L93 Difference]: Finished difference Result 1014 states and 3189 transitions. [2022-01-28 14:58:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:58:22,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 [2022-01-28 14:58:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:22,644 INFO L225 Difference]: With dead ends: 1014 [2022-01-28 14:58:22,644 INFO L226 Difference]: Without dead ends: 985 [2022-01-28 14:58:22,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:22,644 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 84 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:22,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 124 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:58:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-28 14:58:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 667. [2022-01-28 14:58:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.2687687687687688) internal successors, (2177), 666 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2177 transitions. [2022-01-28 14:58:22,655 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2177 transitions. Word has length 21 [2022-01-28 14:58:22,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:22,656 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 2177 transitions. [2022-01-28 14:58:22,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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) [2022-01-28 14:58:22,656 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2177 transitions. [2022-01-28 14:58:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:22,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:22,657 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:22,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Ended with exit code 0 [2022-01-28 14:58:22,867 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 [2022-01-28 14:58:22,867 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:22,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1894100457, now seen corresponding path program 448 times [2022-01-28 14:58:22,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:22,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020337384] [2022-01-28 14:58:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:22,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:22,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020337384] [2022-01-28 14:58:22,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020337384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379757345] [2022-01-28 14:58:22,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:22,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:22,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:22,954 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) [2022-01-28 14:58:22,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-01-28 14:58:22,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:22,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:22,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:23,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:23,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:23,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:23,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:23,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:23,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:23,286 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:23,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:23,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379757345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:23,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:23,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:58:23,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100134780] [2022-01-28 14:58:23,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:23,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:58:23,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:58:23,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:58:23,292 INFO L87 Difference]: Start difference. First operand 667 states and 2177 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) [2022-01-28 14:58:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:23,935 INFO L93 Difference]: Finished difference Result 1236 states and 3817 transitions. [2022-01-28 14:58:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:23,935 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 [2022-01-28 14:58:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:23,937 INFO L225 Difference]: With dead ends: 1236 [2022-01-28 14:58:23,937 INFO L226 Difference]: Without dead ends: 1209 [2022-01-28 14:58:23,937 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 [2022-01-28 14:58:23,937 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 108 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:23,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 273 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-01-28 14:58:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 679. [2022-01-28 14:58:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.2876106194690267) internal successors, (2229), 678 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2229 transitions. [2022-01-28 14:58:23,947 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2229 transitions. Word has length 21 [2022-01-28 14:58:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:23,947 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2229 transitions. [2022-01-28 14:58:23,947 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) [2022-01-28 14:58:23,947 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2229 transitions. [2022-01-28 14:58:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:23,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:23,948 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:23,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:24,148 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 [2022-01-28 14:58:24,148 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1038543729, now seen corresponding path program 449 times [2022-01-28 14:58:24,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:24,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495181414] [2022-01-28 14:58:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:24,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:24,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:24,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495181414] [2022-01-28 14:58:24,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495181414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:24,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218749988] [2022-01-28 14:58:24,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:24,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:24,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:24,222 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) [2022-01-28 14:58:24,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-01-28 14:58:24,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:58:24,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:24,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:24,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:24,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:24,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:24,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:24,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:24,484 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:24,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:24,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218749988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:24,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:24,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:58:24,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098256026] [2022-01-28 14:58:24,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:24,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:58:24,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:58:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:58:24,489 INFO L87 Difference]: Start difference. First operand 679 states and 2229 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) [2022-01-28 14:58:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:24,803 INFO L93 Difference]: Finished difference Result 989 states and 3125 transitions. [2022-01-28 14:58:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:58:24,804 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 [2022-01-28 14:58:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:24,805 INFO L225 Difference]: With dead ends: 989 [2022-01-28 14:58:24,805 INFO L226 Difference]: Without dead ends: 953 [2022-01-28 14:58:24,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:24,805 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:24,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 184 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-01-28 14:58:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 679. [2022-01-28 14:58:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.2831858407079646) internal successors, (2226), 678 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2226 transitions. [2022-01-28 14:58:24,813 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2226 transitions. Word has length 21 [2022-01-28 14:58:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:24,813 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2226 transitions. [2022-01-28 14:58:24,813 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) [2022-01-28 14:58:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2226 transitions. [2022-01-28 14:58:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:24,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:24,814 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:24,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Ended with exit code 0 [2022-01-28 14:58:25,014 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 [2022-01-28 14:58:25,015 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1824597749, now seen corresponding path program 450 times [2022-01-28 14:58:25,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:25,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310980918] [2022-01-28 14:58:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:25,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:25,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:25,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310980918] [2022-01-28 14:58:25,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310980918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:25,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27808274] [2022-01-28 14:58:25,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:25,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:25,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:25,097 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) [2022-01-28 14:58:25,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-01-28 14:58:25,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:58:25,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:25,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:25,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:25,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:25,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:25,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:25,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:25,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:25,431 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:25,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:25,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27808274] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:25,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:25,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:58:25,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989152965] [2022-01-28 14:58:25,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:25,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:58:25,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:58:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:25,437 INFO L87 Difference]: Start difference. First operand 679 states and 2226 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) [2022-01-28 14:58:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:25,828 INFO L93 Difference]: Finished difference Result 1140 states and 3544 transitions. [2022-01-28 14:58:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:58:25,828 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 [2022-01-28 14:58:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:25,830 INFO L225 Difference]: With dead ends: 1140 [2022-01-28 14:58:25,830 INFO L226 Difference]: Without dead ends: 1119 [2022-01-28 14:58:25,830 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 [2022-01-28 14:58:25,830 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:25,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 175 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-01-28 14:58:25,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 665. [2022-01-28 14:58:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 3.2740963855421685) internal successors, (2174), 664 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 2174 transitions. [2022-01-28 14:58:25,838 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 2174 transitions. Word has length 21 [2022-01-28 14:58:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:25,839 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 2174 transitions. [2022-01-28 14:58:25,839 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) [2022-01-28 14:58:25,839 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 2174 transitions. [2022-01-28 14:58:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:25,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:25,839 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] [2022-01-28 14:58:25,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-01-28 14:58:26,040 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 [2022-01-28 14:58:26,040 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:26,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1957967699, now seen corresponding path program 451 times [2022-01-28 14:58:26,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:26,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872390605] [2022-01-28 14:58:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:26,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:26,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:26,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872390605] [2022-01-28 14:58:26,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872390605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:26,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012339099] [2022-01-28 14:58:26,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:26,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:26,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:26,146 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) [2022-01-28 14:58:26,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-01-28 14:58:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:26,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:26,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:26,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:26,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:26,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:26,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:26,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:26,479 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:26,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:26,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012339099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:26,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:26,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:58:26,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232843813] [2022-01-28 14:58:26,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:26,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:58:26,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:26,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:58:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:58:26,484 INFO L87 Difference]: Start difference. First operand 665 states and 2174 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) [2022-01-28 14:58:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:27,167 INFO L93 Difference]: Finished difference Result 1412 states and 4350 transitions. [2022-01-28 14:58:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:58:27,167 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 [2022-01-28 14:58:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:27,170 INFO L225 Difference]: With dead ends: 1412 [2022-01-28 14:58:27,170 INFO L226 Difference]: Without dead ends: 1385 [2022-01-28 14:58:27,170 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 [2022-01-28 14:58:27,170 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:27,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 292 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:27,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-01-28 14:58:27,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 691. [2022-01-28 14:58:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.307246376811594) internal successors, (2282), 690 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2282 transitions. [2022-01-28 14:58:27,181 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2282 transitions. Word has length 21 [2022-01-28 14:58:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:27,181 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 2282 transitions. [2022-01-28 14:58:27,181 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) [2022-01-28 14:58:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2282 transitions. [2022-01-28 14:58:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:27,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:27,182 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] [2022-01-28 14:58:27,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Ended with exit code 0 [2022-01-28 14:58:27,382 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 [2022-01-28 14:58:27,382 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1481442869, now seen corresponding path program 452 times [2022-01-28 14:58:27,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:27,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199397086] [2022-01-28 14:58:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:27,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:27,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:27,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199397086] [2022-01-28 14:58:27,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199397086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:27,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781889379] [2022-01-28 14:58:27,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:27,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:27,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:27,467 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) [2022-01-28 14:58:27,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-01-28 14:58:27,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:27,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:27,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:27,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:27,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:27,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:27,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:27,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:27,722 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:27,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:27,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781889379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:27,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:27,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2022-01-28 14:58:27,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634698830] [2022-01-28 14:58:27,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:27,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:58:27,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:27,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:58:27,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:58:27,727 INFO L87 Difference]: Start difference. First operand 691 states and 2282 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) [2022-01-28 14:58:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:28,026 INFO L93 Difference]: Finished difference Result 1118 states and 3517 transitions. [2022-01-28 14:58:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:58:28,027 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 [2022-01-28 14:58:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:28,028 INFO L225 Difference]: With dead ends: 1118 [2022-01-28 14:58:28,028 INFO L226 Difference]: Without dead ends: 1071 [2022-01-28 14:58:28,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:28,029 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 105 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:28,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 179 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:58:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-01-28 14:58:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 691. [2022-01-28 14:58:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.2956521739130435) internal successors, (2274), 690 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2274 transitions. [2022-01-28 14:58:28,037 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2274 transitions. Word has length 21 [2022-01-28 14:58:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:28,037 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 2274 transitions. [2022-01-28 14:58:28,037 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) [2022-01-28 14:58:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2274 transitions. [2022-01-28 14:58:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:28,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:28,038 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] [2022-01-28 14:58:28,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Ended with exit code 0 [2022-01-28 14:58:28,238 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 [2022-01-28 14:58:28,239 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash -2027470407, now seen corresponding path program 453 times [2022-01-28 14:58:28,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:28,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959079159] [2022-01-28 14:58:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:28,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:28,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959079159] [2022-01-28 14:58:28,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959079159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083567917] [2022-01-28 14:58:28,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:28,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:28,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:28,319 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) [2022-01-28 14:58:28,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-01-28 14:58:28,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:58:28,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:28,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:28,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:28,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:28,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:28,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:28,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:28,636 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:28,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:28,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083567917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:28,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:28,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:58:28,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270337748] [2022-01-28 14:58:28,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:28,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:58:28,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:58:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:28,642 INFO L87 Difference]: Start difference. First operand 691 states and 2274 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) [2022-01-28 14:58:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:29,105 INFO L93 Difference]: Finished difference Result 1320 states and 4093 transitions. [2022-01-28 14:58:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:29,105 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 [2022-01-28 14:58:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:29,107 INFO L225 Difference]: With dead ends: 1320 [2022-01-28 14:58:29,107 INFO L226 Difference]: Without dead ends: 1299 [2022-01-28 14:58:29,107 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 [2022-01-28 14:58:29,107 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 159 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:29,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 211 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-01-28 14:58:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 687. [2022-01-28 14:58:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.295918367346939) internal successors, (2261), 686 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2261 transitions. [2022-01-28 14:58:29,117 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2261 transitions. Word has length 21 [2022-01-28 14:58:29,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:29,117 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 2261 transitions. [2022-01-28 14:58:29,117 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) [2022-01-28 14:58:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2261 transitions. [2022-01-28 14:58:29,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:29,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:29,118 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:29,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Ended with exit code 0 [2022-01-28 14:58:29,318 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 [2022-01-28 14:58:29,319 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1173405301, now seen corresponding path program 454 times [2022-01-28 14:58:29,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:29,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932002240] [2022-01-28 14:58:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:29,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:29,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932002240] [2022-01-28 14:58:29,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932002240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066326578] [2022-01-28 14:58:29,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:29,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:29,393 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) [2022-01-28 14:58:29,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-01-28 14:58:29,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:29,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:29,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:29,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:29,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:29,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:29,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:29,678 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:29,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:29,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066326578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:29,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:29,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:58:29,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995168207] [2022-01-28 14:58:29,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:29,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:58:29,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:58:29,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:58:29,684 INFO L87 Difference]: Start difference. First operand 687 states and 2261 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) [2022-01-28 14:58:30,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:30,220 INFO L93 Difference]: Finished difference Result 1368 states and 4211 transitions. [2022-01-28 14:58:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:58:30,220 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 [2022-01-28 14:58:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:30,222 INFO L225 Difference]: With dead ends: 1368 [2022-01-28 14:58:30,222 INFO L226 Difference]: Without dead ends: 1347 [2022-01-28 14:58:30,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:58:30,222 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 127 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:30,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 282 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-01-28 14:58:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 679. [2022-01-28 14:58:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.281710914454277) internal successors, (2225), 678 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) [2022-01-28 14:58:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2225 transitions. [2022-01-28 14:58:30,232 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2225 transitions. Word has length 21 [2022-01-28 14:58:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:30,232 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2225 transitions. [2022-01-28 14:58:30,233 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) [2022-01-28 14:58:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2225 transitions. [2022-01-28 14:58:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:30,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:30,234 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] [2022-01-28 14:58:30,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:30,445 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 [2022-01-28 14:58:30,445 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2027084268, now seen corresponding path program 455 times [2022-01-28 14:58:30,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:30,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937507253] [2022-01-28 14:58:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:30,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:30,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:30,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937507253] [2022-01-28 14:58:30,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937507253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:30,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010821092] [2022-01-28 14:58:30,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:30,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:30,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:30,554 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) [2022-01-28 14:58:30,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-01-28 14:58:30,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:58:30,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:30,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:58:30,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:30,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:30,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:30,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:30,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:30,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:30,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:31,105 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:31,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:31,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010821092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:31,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:31,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:58:31,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048056564] [2022-01-28 14:58:31,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:31,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:31,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:31,113 INFO L87 Difference]: Start difference. First operand 679 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) [2022-01-28 14:58:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:32,057 INFO L93 Difference]: Finished difference Result 1141 states and 3576 transitions. [2022-01-28 14:58:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:58:32,057 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 [2022-01-28 14:58:32,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:32,059 INFO L225 Difference]: With dead ends: 1141 [2022-01-28 14:58:32,059 INFO L226 Difference]: Without dead ends: 1103 [2022-01-28 14:58:32,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 14:58:32,060 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 149 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:32,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 314 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-01-28 14:58:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 694. [2022-01-28 14:58:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 3.2972582972582973) internal successors, (2285), 693 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2285 transitions. [2022-01-28 14:58:32,069 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2285 transitions. Word has length 21 [2022-01-28 14:58:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:32,069 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 2285 transitions. [2022-01-28 14:58:32,069 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) [2022-01-28 14:58:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2285 transitions. [2022-01-28 14:58:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:32,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:32,070 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:32,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Ended with exit code 0 [2022-01-28 14:58:32,270 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 [2022-01-28 14:58:32,270 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1029021068, now seen corresponding path program 456 times [2022-01-28 14:58:32,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:32,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142716225] [2022-01-28 14:58:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:32,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:32,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142716225] [2022-01-28 14:58:32,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142716225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819131726] [2022-01-28 14:58:32,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:32,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:32,382 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) [2022-01-28 14:58:32,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-01-28 14:58:32,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:58:32,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:32,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:32,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:32,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:32,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:32,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:32,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:32,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:32,780 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:32,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:32,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819131726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:32,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:32,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:32,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411313158] [2022-01-28 14:58:32,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:32,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:32,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:32,788 INFO L87 Difference]: Start difference. First operand 694 states and 2285 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) [2022-01-28 14:58:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:33,422 INFO L93 Difference]: Finished difference Result 1150 states and 3625 transitions. [2022-01-28 14:58:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:58:33,422 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 [2022-01-28 14:58:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:33,424 INFO L225 Difference]: With dead ends: 1150 [2022-01-28 14:58:33,424 INFO L226 Difference]: Without dead ends: 1127 [2022-01-28 14:58:33,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:58:33,424 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 100 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:33,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 332 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-28 14:58:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 700. [2022-01-28 14:58:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 3.296137339055794) internal successors, (2304), 699 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) [2022-01-28 14:58:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2304 transitions. [2022-01-28 14:58:33,433 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2304 transitions. Word has length 21 [2022-01-28 14:58:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:33,433 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 2304 transitions. [2022-01-28 14:58:33,433 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) [2022-01-28 14:58:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2304 transitions. [2022-01-28 14:58:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:33,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:33,434 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:33,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:33,634 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 [2022-01-28 14:58:33,634 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1279143536, now seen corresponding path program 457 times [2022-01-28 14:58:33,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:33,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618050402] [2022-01-28 14:58:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:33,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:33,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:33,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618050402] [2022-01-28 14:58:33,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618050402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:33,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861655989] [2022-01-28 14:58:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:33,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:33,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:33,756 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) [2022-01-28 14:58:33,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-01-28 14:58:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:33,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:33,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:33,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:33,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:33,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:34,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:34,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:34,168 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:34,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:34,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861655989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:34,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:34,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:58:34,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359972022] [2022-01-28 14:58:34,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:34,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:34,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:34,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:34,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:34,177 INFO L87 Difference]: Start difference. First operand 700 states and 2304 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) [2022-01-28 14:58:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:34,591 INFO L93 Difference]: Finished difference Result 1023 states and 3258 transitions. [2022-01-28 14:58:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:58:34,592 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 [2022-01-28 14:58:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:34,593 INFO L225 Difference]: With dead ends: 1023 [2022-01-28 14:58:34,593 INFO L226 Difference]: Without dead ends: 1004 [2022-01-28 14:58:34,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:58:34,593 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:34,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 199 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:34,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-01-28 14:58:34,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 699. [2022-01-28 14:58:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.293696275071633) internal successors, (2299), 698 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2299 transitions. [2022-01-28 14:58:34,602 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2299 transitions. Word has length 21 [2022-01-28 14:58:34,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:34,602 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2299 transitions. [2022-01-28 14:58:34,602 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) [2022-01-28 14:58:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2299 transitions. [2022-01-28 14:58:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:34,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:34,603 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] [2022-01-28 14:58:34,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Ended with exit code 0 [2022-01-28 14:58:34,803 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 [2022-01-28 14:58:34,804 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1256242448, now seen corresponding path program 458 times [2022-01-28 14:58:34,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:34,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198600724] [2022-01-28 14:58:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:34,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:34,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:34,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198600724] [2022-01-28 14:58:34,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198600724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:34,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5605662] [2022-01-28 14:58:34,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:34,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:34,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:34,922 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) [2022-01-28 14:58:34,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-01-28 14:58:34,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:34,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:34,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:34,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:35,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:35,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:35,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:35,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:35,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:35,325 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:35,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:35,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5605662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:35,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:35,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:35,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32551403] [2022-01-28 14:58:35,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:35,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:35,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:35,334 INFO L87 Difference]: Start difference. First operand 699 states and 2299 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) [2022-01-28 14:58:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:36,041 INFO L93 Difference]: Finished difference Result 1180 states and 3707 transitions. [2022-01-28 14:58:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:58:36,041 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 [2022-01-28 14:58:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:36,043 INFO L225 Difference]: With dead ends: 1180 [2022-01-28 14:58:36,043 INFO L226 Difference]: Without dead ends: 1157 [2022-01-28 14:58:36,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:58:36,044 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:36,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 307 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-28 14:58:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 702. [2022-01-28 14:58:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.3009985734664764) internal successors, (2314), 701 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2314 transitions. [2022-01-28 14:58:36,053 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2314 transitions. Word has length 21 [2022-01-28 14:58:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:36,053 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 2314 transitions. [2022-01-28 14:58:36,053 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) [2022-01-28 14:58:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2314 transitions. [2022-01-28 14:58:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:36,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:36,054 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:36,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Ended with exit code 0 [2022-01-28 14:58:36,254 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 [2022-01-28 14:58:36,254 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:36,255 INFO L85 PathProgramCache]: Analyzing trace with hash 940931746, now seen corresponding path program 459 times [2022-01-28 14:58:36,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:36,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119437980] [2022-01-28 14:58:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:36,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:36,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:36,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119437980] [2022-01-28 14:58:36,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119437980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:36,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872582513] [2022-01-28 14:58:36,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:36,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:36,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:36,363 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) [2022-01-28 14:58:36,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-01-28 14:58:36,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:58:36,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:36,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:36,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:36,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:36,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:36,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:36,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:36,748 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:36,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:36,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872582513] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:36,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:36,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:58:36,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833191241] [2022-01-28 14:58:36,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:36,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:36,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:36,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:36,756 INFO L87 Difference]: Start difference. First operand 702 states and 2314 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) [2022-01-28 14:58:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:37,303 INFO L93 Difference]: Finished difference Result 1017 states and 3245 transitions. [2022-01-28 14:58:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:58:37,304 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 [2022-01-28 14:58:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:37,305 INFO L225 Difference]: With dead ends: 1017 [2022-01-28 14:58:37,305 INFO L226 Difference]: Without dead ends: 998 [2022-01-28 14:58:37,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:58:37,306 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:37,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 307 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-01-28 14:58:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 707. [2022-01-28 14:58:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.301699716713881) internal successors, (2331), 706 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2331 transitions. [2022-01-28 14:58:37,314 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2331 transitions. Word has length 21 [2022-01-28 14:58:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:37,314 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 2331 transitions. [2022-01-28 14:58:37,314 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) [2022-01-28 14:58:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2331 transitions. [2022-01-28 14:58:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:37,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:37,315 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] [2022-01-28 14:58:37,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Ended with exit code 0 [2022-01-28 14:58:37,516 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 [2022-01-28 14:58:37,516 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1106423198, now seen corresponding path program 460 times [2022-01-28 14:58:37,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519066325] [2022-01-28 14:58:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:37,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:37,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:37,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519066325] [2022-01-28 14:58:37,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519066325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:37,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905447977] [2022-01-28 14:58:37,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:37,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:37,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:37,624 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) [2022-01-28 14:58:37,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-01-28 14:58:37,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:37,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:37,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:37,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:37,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:37,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:37,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:37,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:37,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:38,005 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:38,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:38,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905447977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:38,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:38,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:38,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547264220] [2022-01-28 14:58:38,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:38,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:38,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:38,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:38,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:38,014 INFO L87 Difference]: Start difference. First operand 707 states and 2331 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) [2022-01-28 14:58:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:38,502 INFO L93 Difference]: Finished difference Result 1009 states and 3225 transitions. [2022-01-28 14:58:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:58:38,503 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 [2022-01-28 14:58:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:38,504 INFO L225 Difference]: With dead ends: 1009 [2022-01-28 14:58:38,504 INFO L226 Difference]: Without dead ends: 990 [2022-01-28 14:58:38,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:58:38,504 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 87 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:38,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 248 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:38,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-28 14:58:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 706. [2022-01-28 14:58:38,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.299290780141844) internal successors, (2326), 705 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2326 transitions. [2022-01-28 14:58:38,513 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2326 transitions. Word has length 21 [2022-01-28 14:58:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:38,513 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2326 transitions. [2022-01-28 14:58:38,513 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) [2022-01-28 14:58:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2326 transitions. [2022-01-28 14:58:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:38,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:38,514 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:38,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Ended with exit code 0 [2022-01-28 14:58:38,714 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 [2022-01-28 14:58:38,714 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:38,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:38,715 INFO L85 PathProgramCache]: Analyzing trace with hash -391271528, now seen corresponding path program 461 times [2022-01-28 14:58:38,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:38,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869588498] [2022-01-28 14:58:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:38,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:38,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:38,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869588498] [2022-01-28 14:58:38,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869588498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:38,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603191014] [2022-01-28 14:58:38,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:38,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:38,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:38,822 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) [2022-01-28 14:58:38,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-01-28 14:58:38,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:58:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:58:38,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:38,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:38,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:39,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:39,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:39,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:39,333 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:39,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:39,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603191014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:39,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:39,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-28 14:58:39,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672755336] [2022-01-28 14:58:39,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:39,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:58:39,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:39,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:58:39,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:58:39,341 INFO L87 Difference]: Start difference. First operand 706 states and 2326 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:39,971 INFO L93 Difference]: Finished difference Result 1026 states and 3266 transitions. [2022-01-28 14:58:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:39,972 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:58:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:39,973 INFO L225 Difference]: With dead ends: 1026 [2022-01-28 14:58:39,973 INFO L226 Difference]: Without dead ends: 969 [2022-01-28 14:58:39,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:58:39,974 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:39,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 267 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:39,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-28 14:58:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 706. [2022-01-28 14:58:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.299290780141844) internal successors, (2326), 705 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2326 transitions. [2022-01-28 14:58:39,982 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2326 transitions. Word has length 21 [2022-01-28 14:58:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:39,982 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2326 transitions. [2022-01-28 14:58:39,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2326 transitions. [2022-01-28 14:58:39,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:39,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:39,983 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] [2022-01-28 14:58:39,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Ended with exit code 0 [2022-01-28 14:58:40,183 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 [2022-01-28 14:58:40,184 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:40,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2104864920, now seen corresponding path program 462 times [2022-01-28 14:58:40,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:40,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081762201] [2022-01-28 14:58:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:40,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:40,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081762201] [2022-01-28 14:58:40,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081762201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267232354] [2022-01-28 14:58:40,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:40,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:40,295 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) [2022-01-28 14:58:40,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-01-28 14:58:40,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:58:40,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:40,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:40,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:40,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:40,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:40,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:40,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:40,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:40,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:40,693 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:40,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:40,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267232354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:40,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:40,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:40,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201935756] [2022-01-28 14:58:40,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:40,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:40,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:40,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:40,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:40,701 INFO L87 Difference]: Start difference. First operand 706 states and 2326 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) [2022-01-28 14:58:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:41,185 INFO L93 Difference]: Finished difference Result 1105 states and 3503 transitions. [2022-01-28 14:58:41,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:41,186 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 [2022-01-28 14:58:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:41,187 INFO L225 Difference]: With dead ends: 1105 [2022-01-28 14:58:41,187 INFO L226 Difference]: Without dead ends: 1082 [2022-01-28 14:58:41,188 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 [2022-01-28 14:58:41,188 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 135 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:41,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 211 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-01-28 14:58:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 712. [2022-01-28 14:58:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.30239099859353) internal successors, (2348), 711 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2348 transitions. [2022-01-28 14:58:41,196 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2348 transitions. Word has length 21 [2022-01-28 14:58:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:41,197 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2348 transitions. [2022-01-28 14:58:41,197 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) [2022-01-28 14:58:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2348 transitions. [2022-01-28 14:58:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:41,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:41,197 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:41,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:41,398 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 [2022-01-28 14:58:41,398 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2086592222, now seen corresponding path program 463 times [2022-01-28 14:58:41,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303966443] [2022-01-28 14:58:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:41,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:41,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:41,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303966443] [2022-01-28 14:58:41,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303966443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:41,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569685031] [2022-01-28 14:58:41,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:41,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:41,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:41,510 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) [2022-01-28 14:58:41,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-01-28 14:58:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:41,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:41,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:41,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:41,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:41,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:41,885 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:41,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:41,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569685031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:41,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:41,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:41,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718645729] [2022-01-28 14:58:41,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:41,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:41,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:41,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:41,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:41,893 INFO L87 Difference]: Start difference. First operand 712 states and 2348 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) [2022-01-28 14:58:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:42,258 INFO L93 Difference]: Finished difference Result 1012 states and 3227 transitions. [2022-01-28 14:58:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:58:42,258 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 [2022-01-28 14:58:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:42,259 INFO L225 Difference]: With dead ends: 1012 [2022-01-28 14:58:42,259 INFO L226 Difference]: Without dead ends: 993 [2022-01-28 14:58:42,260 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 [2022-01-28 14:58:42,260 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 73 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:42,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 203 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-01-28 14:58:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 709. [2022-01-28 14:58:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 3.3022598870056497) internal successors, (2338), 708 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) [2022-01-28 14:58:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 2338 transitions. [2022-01-28 14:58:42,268 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 2338 transitions. Word has length 21 [2022-01-28 14:58:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:42,268 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 2338 transitions. [2022-01-28 14:58:42,268 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) [2022-01-28 14:58:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 2338 transitions. [2022-01-28 14:58:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:42,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:42,269 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] [2022-01-28 14:58:42,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Ended with exit code 0 [2022-01-28 14:58:42,469 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 [2022-01-28 14:58:42,470 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -265939404, now seen corresponding path program 464 times [2022-01-28 14:58:42,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:42,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560479618] [2022-01-28 14:58:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:42,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:42,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560479618] [2022-01-28 14:58:42,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560479618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320962133] [2022-01-28 14:58:42,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:42,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:42,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:42,567 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) [2022-01-28 14:58:42,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-01-28 14:58:42,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:42,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:42,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:42,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:42,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:42,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:42,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:42,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:42,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:42,906 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:42,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:42,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320962133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:42,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:42,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:58:42,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393208531] [2022-01-28 14:58:42,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:42,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:58:42,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:42,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:58:42,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:58:42,914 INFO L87 Difference]: Start difference. First operand 709 states and 2338 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) [2022-01-28 14:58:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:43,375 INFO L93 Difference]: Finished difference Result 1075 states and 3421 transitions. [2022-01-28 14:58:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:43,375 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 [2022-01-28 14:58:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:43,376 INFO L225 Difference]: With dead ends: 1075 [2022-01-28 14:58:43,376 INFO L226 Difference]: Without dead ends: 1056 [2022-01-28 14:58:43,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:58:43,377 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 106 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:43,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 211 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-01-28 14:58:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 715. [2022-01-28 14:58:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.2941176470588234) internal successors, (2352), 714 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2352 transitions. [2022-01-28 14:58:43,386 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2352 transitions. Word has length 21 [2022-01-28 14:58:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:43,386 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 2352 transitions. [2022-01-28 14:58:43,386 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) [2022-01-28 14:58:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2352 transitions. [2022-01-28 14:58:43,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:43,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:43,387 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:43,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Ended with exit code 0 [2022-01-28 14:58:43,587 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 [2022-01-28 14:58:43,587 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:43,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:43,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1981672948, now seen corresponding path program 465 times [2022-01-28 14:58:43,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:43,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332281733] [2022-01-28 14:58:43,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:43,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:43,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:43,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332281733] [2022-01-28 14:58:43,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332281733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:43,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975334986] [2022-01-28 14:58:43,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:43,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:43,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:43,689 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) [2022-01-28 14:58:43,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-01-28 14:58:43,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:58:43,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:43,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:43,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:43,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:43,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:43,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:44,045 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:44,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:44,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975334986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:44,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:44,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 14:58:44,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501166619] [2022-01-28 14:58:44,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:44,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:58:44,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:58:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:58:44,053 INFO L87 Difference]: Start difference. First operand 715 states and 2352 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) [2022-01-28 14:58:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:44,556 INFO L93 Difference]: Finished difference Result 1067 states and 3401 transitions. [2022-01-28 14:58:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:44,556 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 [2022-01-28 14:58:44,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:44,557 INFO L225 Difference]: With dead ends: 1067 [2022-01-28 14:58:44,557 INFO L226 Difference]: Without dead ends: 1048 [2022-01-28 14:58:44,557 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 [2022-01-28 14:58:44,558 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:44,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 223 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-01-28 14:58:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 714. [2022-01-28 14:58:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.291725105189341) internal successors, (2347), 713 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2347 transitions. [2022-01-28 14:58:44,566 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2347 transitions. Word has length 21 [2022-01-28 14:58:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:44,566 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2347 transitions. [2022-01-28 14:58:44,566 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) [2022-01-28 14:58:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2347 transitions. [2022-01-28 14:58:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:44,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:44,567 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:44,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:44,768 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 [2022-01-28 14:58:44,768 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1598142678, now seen corresponding path program 466 times [2022-01-28 14:58:44,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:44,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995490425] [2022-01-28 14:58:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:44,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:44,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995490425] [2022-01-28 14:58:44,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995490425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:44,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728159273] [2022-01-28 14:58:44,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:44,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:44,867 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) [2022-01-28 14:58:44,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-01-28 14:58:44,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:44,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:44,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:44,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:44,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:44,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:45,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:45,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:45,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:45,217 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:45,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:45,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728159273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:45,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:45,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:58:45,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078299669] [2022-01-28 14:58:45,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:45,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:58:45,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:45,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:58:45,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:45,226 INFO L87 Difference]: Start difference. First operand 714 states and 2347 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2022-01-28 14:58:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:45,671 INFO L93 Difference]: Finished difference Result 1007 states and 3213 transitions. [2022-01-28 14:58:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:58:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 [2022-01-28 14:58:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:45,673 INFO L225 Difference]: With dead ends: 1007 [2022-01-28 14:58:45,673 INFO L226 Difference]: Without dead ends: 988 [2022-01-28 14:58:45,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:58:45,673 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 86 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:45,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 244 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-01-28 14:58:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 698. [2022-01-28 14:58:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.2869440459110475) internal successors, (2291), 697 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2291 transitions. [2022-01-28 14:58:45,681 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2291 transitions. Word has length 21 [2022-01-28 14:58:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:45,681 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 2291 transitions. [2022-01-28 14:58:45,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2022-01-28 14:58:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2291 transitions. [2022-01-28 14:58:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:45,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:45,682 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:45,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Ended with exit code 0 [2022-01-28 14:58:45,883 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 [2022-01-28 14:58:45,883 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1521367628, now seen corresponding path program 467 times [2022-01-28 14:58:45,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:45,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794235191] [2022-01-28 14:58:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:45,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:45,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:45,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794235191] [2022-01-28 14:58:45,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794235191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:45,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678642540] [2022-01-28 14:58:45,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:45,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:45,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:45,976 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) [2022-01-28 14:58:45,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-01-28 14:58:46,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:58:46,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:58:46,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:46,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:46,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:46,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:46,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:46,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:46,381 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:46,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:46,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678642540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:46,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:46,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:58:46,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989804693] [2022-01-28 14:58:46,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:46,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:58:46,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:58:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:58:46,386 INFO L87 Difference]: Start difference. First operand 698 states and 2291 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) [2022-01-28 14:58:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:47,115 INFO L93 Difference]: Finished difference Result 1252 states and 3942 transitions. [2022-01-28 14:58:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:47,115 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 [2022-01-28 14:58:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:47,117 INFO L225 Difference]: With dead ends: 1252 [2022-01-28 14:58:47,117 INFO L226 Difference]: Without dead ends: 1195 [2022-01-28 14:58:47,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:58:47,117 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:47,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 300 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-01-28 14:58:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 691. [2022-01-28 14:58:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.289855072463768) internal successors, (2270), 690 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2270 transitions. [2022-01-28 14:58:47,126 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2270 transitions. Word has length 21 [2022-01-28 14:58:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:47,126 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 2270 transitions. [2022-01-28 14:58:47,127 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) [2022-01-28 14:58:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2270 transitions. [2022-01-28 14:58:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:47,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:47,127 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:47,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Ended with exit code 0 [2022-01-28 14:58:47,328 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 [2022-01-28 14:58:47,328 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1921355948, now seen corresponding path program 468 times [2022-01-28 14:58:47,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:47,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679256243] [2022-01-28 14:58:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:47,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:47,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679256243] [2022-01-28 14:58:47,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679256243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:47,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628041730] [2022-01-28 14:58:47,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:47,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:47,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:47,438 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) [2022-01-28 14:58:47,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-01-28 14:58:47,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:58:47,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:47,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:47,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:47,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:47,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 14:58:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:47,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:47,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:47,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:47,830 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:47,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:47,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628041730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:47,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:47,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:47,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822282544] [2022-01-28 14:58:47,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:47,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:47,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:47,838 INFO L87 Difference]: Start difference. First operand 691 states and 2270 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) [2022-01-28 14:58:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:48,407 INFO L93 Difference]: Finished difference Result 1204 states and 3781 transitions. [2022-01-28 14:58:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:58:48,407 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 [2022-01-28 14:58:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:48,409 INFO L225 Difference]: With dead ends: 1204 [2022-01-28 14:58:48,409 INFO L226 Difference]: Without dead ends: 1181 [2022-01-28 14:58:48,409 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 [2022-01-28 14:58:48,409 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 162 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:48,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 222 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:58:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-01-28 14:58:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 714. [2022-01-28 14:58:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.291725105189341) internal successors, (2347), 713 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2347 transitions. [2022-01-28 14:58:48,419 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2347 transitions. Word has length 21 [2022-01-28 14:58:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:48,419 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2347 transitions. [2022-01-28 14:58:48,419 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) [2022-01-28 14:58:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2347 transitions. [2022-01-28 14:58:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:48,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:48,420 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:48,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:48,620 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 [2022-01-28 14:58:48,620 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1817845794, now seen corresponding path program 469 times [2022-01-28 14:58:48,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:48,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607413439] [2022-01-28 14:58:48,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:48,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:48,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:48,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607413439] [2022-01-28 14:58:48,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607413439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:48,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452923329] [2022-01-28 14:58:48,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:48,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:48,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:48,729 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) [2022-01-28 14:58:48,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-01-28 14:58:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:48,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:48,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:48,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:48,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:48,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:49,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:49,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:49,089 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:49,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:49,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452923329] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:49,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:49,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:49,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136854518] [2022-01-28 14:58:49,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:49,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:49,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:49,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:49,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:49,097 INFO L87 Difference]: Start difference. First operand 714 states and 2347 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) [2022-01-28 14:58:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:49,594 INFO L93 Difference]: Finished difference Result 1133 states and 3583 transitions. [2022-01-28 14:58:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:58:49,595 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 [2022-01-28 14:58:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:49,596 INFO L225 Difference]: With dead ends: 1133 [2022-01-28 14:58:49,596 INFO L226 Difference]: Without dead ends: 1114 [2022-01-28 14:58:49,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:58:49,596 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:49,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 243 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-01-28 14:58:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 711. [2022-01-28 14:58:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.2915492957746477) internal successors, (2337), 710 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2337 transitions. [2022-01-28 14:58:49,605 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2337 transitions. Word has length 21 [2022-01-28 14:58:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:49,606 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2337 transitions. [2022-01-28 14:58:49,606 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) [2022-01-28 14:58:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2337 transitions. [2022-01-28 14:58:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:49,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:49,606 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:49,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Ended with exit code 0 [2022-01-28 14:58:49,807 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 [2022-01-28 14:58:49,807 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash -332756468, now seen corresponding path program 470 times [2022-01-28 14:58:49,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:49,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244142934] [2022-01-28 14:58:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:49,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:49,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:49,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244142934] [2022-01-28 14:58:49,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244142934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:49,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011804743] [2022-01-28 14:58:49,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:49,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:49,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:49,892 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) [2022-01-28 14:58:49,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-01-28 14:58:49,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:49,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:50,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:50,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:50,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:50,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:50,202 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 14:58:50,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 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 [2022-01-28 14:58:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:50,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011804743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:50,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:50,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-28 14:58:50,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033467027] [2022-01-28 14:58:50,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:50,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:58:50,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:50,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:58:50,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:58:50,210 INFO L87 Difference]: Start difference. First operand 711 states and 2337 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) [2022-01-28 14:58:50,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:50,725 INFO L93 Difference]: Finished difference Result 1282 states and 4025 transitions. [2022-01-28 14:58:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:50,726 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 [2022-01-28 14:58:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:50,728 INFO L225 Difference]: With dead ends: 1282 [2022-01-28 14:58:50,728 INFO L226 Difference]: Without dead ends: 1263 [2022-01-28 14:58:50,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:58:50,728 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 117 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:50,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 284 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:58:50,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-01-28 14:58:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 699. [2022-01-28 14:58:50,737 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) [2022-01-28 14:58:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2293 transitions. [2022-01-28 14:58:50,738 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2293 transitions. Word has length 21 [2022-01-28 14:58:50,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:50,739 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2293 transitions. [2022-01-28 14:58:50,739 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) [2022-01-28 14:58:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2293 transitions. [2022-01-28 14:58:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:50,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:50,739 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] [2022-01-28 14:58:50,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Ended with exit code 0 [2022-01-28 14:58:50,940 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 [2022-01-28 14:58:50,940 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1392938394, now seen corresponding path program 471 times [2022-01-28 14:58:50,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:50,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923234305] [2022-01-28 14:58:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:50,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:51,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:51,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923234305] [2022-01-28 14:58:51,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923234305] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:51,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465819838] [2022-01-28 14:58:51,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:51,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:51,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:51,064 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) [2022-01-28 14:58:51,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-01-28 14:58:51,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:58:51,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:51,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:51,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:51,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:51,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:51,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:51,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:51,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:51,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:51,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:51,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:51,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:51,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:51,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:51,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465819838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:51,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:51,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:58:51,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169978132] [2022-01-28 14:58:51,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:51,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:51,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:51,558 INFO L87 Difference]: Start difference. First operand 699 states and 2293 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) [2022-01-28 14:58:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:51,992 INFO L93 Difference]: Finished difference Result 1034 states and 3301 transitions. [2022-01-28 14:58:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:58:51,992 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 [2022-01-28 14:58:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:51,993 INFO L225 Difference]: With dead ends: 1034 [2022-01-28 14:58:51,993 INFO L226 Difference]: Without dead ends: 1015 [2022-01-28 14:58:51,994 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 [2022-01-28 14:58:51,994 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:51,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 242 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 670 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-01-28 14:58:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-01-28 14:58:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 701. [2022-01-28 14:58:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.282857142857143) internal successors, (2298), 700 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2298 transitions. [2022-01-28 14:58:52,002 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2298 transitions. Word has length 21 [2022-01-28 14:58:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:52,002 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 2298 transitions. [2022-01-28 14:58:52,002 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) [2022-01-28 14:58:52,003 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2298 transitions. [2022-01-28 14:58:52,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:52,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:52,003 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:52,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:52,204 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 [2022-01-28 14:58:52,204 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1381427179, now seen corresponding path program 472 times [2022-01-28 14:58:52,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:52,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827481670] [2022-01-28 14:58:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:52,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:52,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:52,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827481670] [2022-01-28 14:58:52,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827481670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:52,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334031989] [2022-01-28 14:58:52,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:52,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:52,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:52,304 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) [2022-01-28 14:58:52,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-01-28 14:58:52,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:52,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:52,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:52,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:52,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:52,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:52,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:52,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:52,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:52,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:52,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:52,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:52,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:52,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:52,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:52,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:52,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334031989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:52,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:52,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:52,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473995729] [2022-01-28 14:58:52,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:52,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:52,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:52,794 INFO L87 Difference]: Start difference. First operand 701 states and 2298 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) [2022-01-28 14:58:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:53,181 INFO L93 Difference]: Finished difference Result 1084 states and 3432 transitions. [2022-01-28 14:58:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:58:53,181 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 [2022-01-28 14:58:53,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:53,183 INFO L225 Difference]: With dead ends: 1084 [2022-01-28 14:58:53,183 INFO L226 Difference]: Without dead ends: 1024 [2022-01-28 14:58:53,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:58:53,183 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:53,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 267 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 783 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2022-01-28 14:58:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-01-28 14:58:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 703. [2022-01-28 14:58:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.280626780626781) internal successors, (2303), 702 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2303 transitions. [2022-01-28 14:58:53,192 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2303 transitions. Word has length 21 [2022-01-28 14:58:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:53,192 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2303 transitions. [2022-01-28 14:58:53,192 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) [2022-01-28 14:58:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2303 transitions. [2022-01-28 14:58:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:53,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:53,193 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:53,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Ended with exit code 0 [2022-01-28 14:58:53,393 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 [2022-01-28 14:58:53,393 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:53,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash 394875194, now seen corresponding path program 473 times [2022-01-28 14:58:53,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:53,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163814179] [2022-01-28 14:58:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:53,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:53,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:53,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163814179] [2022-01-28 14:58:53,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163814179] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:53,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275004779] [2022-01-28 14:58:53,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:58:53,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:53,515 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) [2022-01-28 14:58:53,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-01-28 14:58:53,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:53,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:53,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:53,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:53,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:53,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:53,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:53,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:53,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:53,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:53,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:53,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:53,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:53,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:53,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:53,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:53,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:53,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275004779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:53,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:53,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:58:53,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240746966] [2022-01-28 14:58:53,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:53,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:53,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:53,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:53,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:53,997 INFO L87 Difference]: Start difference. First operand 703 states and 2303 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) [2022-01-28 14:58:54,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:54,480 INFO L93 Difference]: Finished difference Result 1192 states and 3791 transitions. [2022-01-28 14:58:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:58:54,481 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 [2022-01-28 14:58:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:54,482 INFO L225 Difference]: With dead ends: 1192 [2022-01-28 14:58:54,482 INFO L226 Difference]: Without dead ends: 1169 [2022-01-28 14:58:54,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:58:54,483 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:54,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 260 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 739 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-01-28 14:58:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-28 14:58:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 701. [2022-01-28 14:58:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.282857142857143) internal successors, (2298), 700 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2298 transitions. [2022-01-28 14:58:54,496 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2298 transitions. Word has length 21 [2022-01-28 14:58:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:54,496 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 2298 transitions. [2022-01-28 14:58:54,496 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) [2022-01-28 14:58:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2298 transitions. [2022-01-28 14:58:54,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:54,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:54,498 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:54,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:54,711 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 [2022-01-28 14:58:54,711 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:54,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1435110992, now seen corresponding path program 474 times [2022-01-28 14:58:54,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:54,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233055071] [2022-01-28 14:58:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:54,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:54,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233055071] [2022-01-28 14:58:54,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233055071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411129942] [2022-01-28 14:58:54,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:58:54,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:54,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:54,835 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) [2022-01-28 14:58:54,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-01-28 14:58:54,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:58:54,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:54,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:54,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:54,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:54,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:54,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:54,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:55,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:55,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:55,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:55,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:55,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:55,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:55,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:55,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411129942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:55,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:55,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:58:55,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496984569] [2022-01-28 14:58:55,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:55,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:55,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:55,297 INFO L87 Difference]: Start difference. First operand 701 states and 2298 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) [2022-01-28 14:58:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:55,738 INFO L93 Difference]: Finished difference Result 1108 states and 3492 transitions. [2022-01-28 14:58:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:58:55,738 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 [2022-01-28 14:58:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:55,740 INFO L225 Difference]: With dead ends: 1108 [2022-01-28 14:58:55,740 INFO L226 Difference]: Without dead ends: 1058 [2022-01-28 14:58:55,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:58:55,740 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:55,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 244 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 775 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-01-28 14:58:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-01-28 14:58:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 701. [2022-01-28 14:58:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.282857142857143) internal successors, (2298), 700 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2298 transitions. [2022-01-28 14:58:55,749 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2298 transitions. Word has length 21 [2022-01-28 14:58:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:55,749 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 2298 transitions. [2022-01-28 14:58:55,749 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) [2022-01-28 14:58:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2298 transitions. [2022-01-28 14:58:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:55,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:55,750 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] [2022-01-28 14:58:55,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Ended with exit code 0 [2022-01-28 14:58:55,950 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 [2022-01-28 14:58:55,950 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2038351989, now seen corresponding path program 475 times [2022-01-28 14:58:55,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:55,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957651459] [2022-01-28 14:58:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:55,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:56,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:56,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957651459] [2022-01-28 14:58:56,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957651459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:56,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218781963] [2022-01-28 14:58:56,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:58:56,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:56,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:56,073 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) [2022-01-28 14:58:56,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-01-28 14:58:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:56,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:56,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:56,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:56,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:56,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:56,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:56,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:56,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:56,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:56,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:56,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:56,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:56,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:56,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218781963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:56,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:56,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:56,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639756434] [2022-01-28 14:58:56,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:56,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:56,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:56,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:56,541 INFO L87 Difference]: Start difference. First operand 701 states and 2298 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) [2022-01-28 14:58:57,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:57,016 INFO L93 Difference]: Finished difference Result 1114 states and 3522 transitions. [2022-01-28 14:58:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:58:57,016 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 [2022-01-28 14:58:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:57,018 INFO L225 Difference]: With dead ends: 1114 [2022-01-28 14:58:57,018 INFO L226 Difference]: Without dead ends: 1087 [2022-01-28 14:58:57,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:58:57,018 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:57,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 215 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 673 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-01-28 14:58:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-01-28 14:58:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 703. [2022-01-28 14:58:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.280626780626781) internal successors, (2303), 702 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2303 transitions. [2022-01-28 14:58:57,027 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2303 transitions. Word has length 21 [2022-01-28 14:58:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:57,027 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2303 transitions. [2022-01-28 14:58:57,027 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) [2022-01-28 14:58:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2303 transitions. [2022-01-28 14:58:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:57,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:57,028 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:57,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:57,229 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 [2022-01-28 14:58:57,229 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1040288789, now seen corresponding path program 476 times [2022-01-28 14:58:57,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:57,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455560747] [2022-01-28 14:58:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:57,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:57,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455560747] [2022-01-28 14:58:57,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455560747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:57,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542123707] [2022-01-28 14:58:57,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:58:57,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:57,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:57,354 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) [2022-01-28 14:58:57,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-01-28 14:58:57,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:58:57,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:57,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:57,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:57,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:57,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:57,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:57,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:57,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:57,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:57,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:57,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:57,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:57,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:57,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:57,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:57,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542123707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:57,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:57,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:58:57,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931047149] [2022-01-28 14:58:57,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:57,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:58:57,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:58:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:58:57,835 INFO L87 Difference]: Start difference. First operand 703 states and 2303 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) [2022-01-28 14:58:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:58,279 INFO L93 Difference]: Finished difference Result 1015 states and 3241 transitions. [2022-01-28 14:58:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:58:58,279 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 [2022-01-28 14:58:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:58,281 INFO L225 Difference]: With dead ends: 1015 [2022-01-28 14:58:58,281 INFO L226 Difference]: Without dead ends: 994 [2022-01-28 14:58:58,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:58:58,281 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:58,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 236 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 735 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-01-28 14:58:58,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-01-28 14:58:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 705. [2022-01-28 14:58:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.28125) internal successors, (2310), 704 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:58:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2310 transitions. [2022-01-28 14:58:58,290 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2310 transitions. Word has length 21 [2022-01-28 14:58:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:58,290 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2310 transitions. [2022-01-28 14:58:58,290 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) [2022-01-28 14:58:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2310 transitions. [2022-01-28 14:58:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:58,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:58,291 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] [2022-01-28 14:58:58,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Forceful destruction successful, exit code 0 [2022-01-28 14:58:58,491 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 [2022-01-28 14:58:58,491 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:58,492 INFO L85 PathProgramCache]: Analyzing trace with hash 263404533, now seen corresponding path program 477 times [2022-01-28 14:58:58,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:58,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277465506] [2022-01-28 14:58:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:58,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:58,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277465506] [2022-01-28 14:58:58,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277465506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901290734] [2022-01-28 14:58:58,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:58:58,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:58,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:58,599 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) [2022-01-28 14:58:58,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-01-28 14:58:58,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:58:58,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:58,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:58,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:58,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:58,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:58,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:58,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:58,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:58,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:58:58,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:58,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:58:58,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:58,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:58,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:58:58,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:59,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901290734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:58:59,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:58:59,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:58:59,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760955236] [2022-01-28 14:58:59,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:58:59,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:58:59,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:58:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:58:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:58:59,064 INFO L87 Difference]: Start difference. First operand 705 states and 2310 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) [2022-01-28 14:58:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:58:59,439 INFO L93 Difference]: Finished difference Result 975 states and 3123 transitions. [2022-01-28 14:58:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:58:59,439 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 [2022-01-28 14:58:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:58:59,440 INFO L225 Difference]: With dead ends: 975 [2022-01-28 14:58:59,440 INFO L226 Difference]: Without dead ends: 960 [2022-01-28 14:58:59,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:58:59,441 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:58:59,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 201 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 643 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-28 14:58:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-01-28 14:58:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 699. [2022-01-28 14:58:59,448 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) [2022-01-28 14:58:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2293 transitions. [2022-01-28 14:58:59,449 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2293 transitions. Word has length 21 [2022-01-28 14:58:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:58:59,449 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2293 transitions. [2022-01-28 14:58:59,449 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) [2022-01-28 14:58:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2293 transitions. [2022-01-28 14:58:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:58:59,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:58:59,450 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:58:59,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Ended with exit code 0 [2022-01-28 14:58:59,650 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 [2022-01-28 14:58:59,650 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:58:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:58:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1529954323, now seen corresponding path program 478 times [2022-01-28 14:58:59,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:58:59,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987858362] [2022-01-28 14:58:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:58:59,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:58:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:58:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:58:59,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:58:59,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987858362] [2022-01-28 14:58:59,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987858362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:58:59,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493347563] [2022-01-28 14:58:59,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:58:59,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:58:59,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:58:59,755 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) [2022-01-28 14:58:59,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-01-28 14:58:59,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:58:59,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:58:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:58:59,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:58:59,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:59,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:58:59,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:59,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:58:59,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:58:59,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:00,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:00,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:00,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:00,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:00,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:00,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:00,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:00,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493347563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:00,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:00,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:00,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295172022] [2022-01-28 14:59:00,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:00,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:00,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:00,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:00,169 INFO L87 Difference]: Start difference. First operand 699 states and 2293 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) [2022-01-28 14:59:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:00,312 INFO L93 Difference]: Finished difference Result 851 states and 2723 transitions. [2022-01-28 14:59:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:59:00,312 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 [2022-01-28 14:59:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:00,313 INFO L225 Difference]: With dead ends: 851 [2022-01-28 14:59:00,313 INFO L226 Difference]: Without dead ends: 793 [2022-01-28 14:59:00,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:00,313 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:00,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 155 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 361 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-01-28 14:59:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-01-28 14:59:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 706. [2022-01-28 14:59:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.2879432624113476) internal successors, (2318), 705 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2318 transitions. [2022-01-28 14:59:00,321 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2318 transitions. Word has length 21 [2022-01-28 14:59:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:00,321 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2318 transitions. [2022-01-28 14:59:00,321 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) [2022-01-28 14:59:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2318 transitions. [2022-01-28 14:59:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:00,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:00,322 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] [2022-01-28 14:59:00,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Ended with exit code 0 [2022-01-28 14:59:00,522 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 [2022-01-28 14:59:00,522 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:00,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1766949773, now seen corresponding path program 479 times [2022-01-28 14:59:00,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:00,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904325071] [2022-01-28 14:59:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:00,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:00,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:00,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904325071] [2022-01-28 14:59:00,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904325071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:00,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279280806] [2022-01-28 14:59:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:00,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:00,631 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) [2022-01-28 14:59:00,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-01-28 14:59:00,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:59:00,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:00,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:00,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:00,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:00,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:00,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:00,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:00,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:00,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:00,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:00,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:00,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:00,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:00,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:00,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279280806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:00,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:00,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:59:00,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566699920] [2022-01-28 14:59:00,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:00,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:59:00,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:59:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:00,991 INFO L87 Difference]: Start difference. First operand 706 states and 2318 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) [2022-01-28 14:59:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:01,184 INFO L93 Difference]: Finished difference Result 769 states and 2500 transitions. [2022-01-28 14:59:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:59:01,184 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 [2022-01-28 14:59:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:01,185 INFO L225 Difference]: With dead ends: 769 [2022-01-28 14:59:01,185 INFO L226 Difference]: Without dead ends: 747 [2022-01-28 14:59:01,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:01,186 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:01,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 147 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 525 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-28 14:59:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-01-28 14:59:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 709. [2022-01-28 14:59:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 3.290960451977401) internal successors, (2330), 708 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 2330 transitions. [2022-01-28 14:59:01,193 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 2330 transitions. Word has length 21 [2022-01-28 14:59:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:01,193 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 2330 transitions. [2022-01-28 14:59:01,193 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) [2022-01-28 14:59:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 2330 transitions. [2022-01-28 14:59:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:01,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:01,194 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] [2022-01-28 14:59:01,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Ended with exit code 0 [2022-01-28 14:59:01,394 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 [2022-01-28 14:59:01,395 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:01,395 INFO L85 PathProgramCache]: Analyzing trace with hash 990065517, now seen corresponding path program 480 times [2022-01-28 14:59:01,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:01,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234577182] [2022-01-28 14:59:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:01,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:01,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:01,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234577182] [2022-01-28 14:59:01,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234577182] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:01,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669768219] [2022-01-28 14:59:01,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:01,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:01,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:01,504 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) [2022-01-28 14:59:01,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-01-28 14:59:01,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:59:01,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:01,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:01,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:01,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:01,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:01,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:01,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:01,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:01,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:01,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:01,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:01,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:01,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:01,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:01,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:01,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669768219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:01,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:01,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:01,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647698259] [2022-01-28 14:59:01,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:01,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:01,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:01,905 INFO L87 Difference]: Start difference. First operand 709 states and 2330 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) [2022-01-28 14:59:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:02,056 INFO L93 Difference]: Finished difference Result 781 states and 2521 transitions. [2022-01-28 14:59:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:59:02,057 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 [2022-01-28 14:59:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:02,058 INFO L225 Difference]: With dead ends: 781 [2022-01-28 14:59:02,058 INFO L226 Difference]: Without dead ends: 759 [2022-01-28 14:59:02,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:02,058 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:02,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 142 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 404 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-01-28 14:59:02,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-28 14:59:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 707. [2022-01-28 14:59:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.2932011331444757) internal successors, (2325), 706 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2325 transitions. [2022-01-28 14:59:02,066 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2325 transitions. Word has length 21 [2022-01-28 14:59:02,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:02,066 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 2325 transitions. [2022-01-28 14:59:02,066 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) [2022-01-28 14:59:02,066 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2325 transitions. [2022-01-28 14:59:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:02,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:02,067 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] [2022-01-28 14:59:02,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Ended with exit code 0 [2022-01-28 14:59:02,267 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 [2022-01-28 14:59:02,267 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash -230540111, now seen corresponding path program 481 times [2022-01-28 14:59:02,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:02,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809193707] [2022-01-28 14:59:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:02,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:02,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:02,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809193707] [2022-01-28 14:59:02,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809193707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:02,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084193459] [2022-01-28 14:59:02,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:02,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:02,371 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) [2022-01-28 14:59:02,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-01-28 14:59:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:02,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:02,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:02,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:02,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:02,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:02,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:02,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:02,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:02,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:02,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:02,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:02,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:02,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:02,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084193459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:02,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:02,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:02,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831357016] [2022-01-28 14:59:02,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:02,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:02,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:02,808 INFO L87 Difference]: Start difference. First operand 707 states and 2325 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) [2022-01-28 14:59:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:03,002 INFO L93 Difference]: Finished difference Result 847 states and 2713 transitions. [2022-01-28 14:59:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:59:03,003 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 [2022-01-28 14:59:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:03,004 INFO L225 Difference]: With dead ends: 847 [2022-01-28 14:59:03,004 INFO L226 Difference]: Without dead ends: 803 [2022-01-28 14:59:03,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:03,004 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:03,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 157 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 519 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-01-28 14:59:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-28 14:59:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 703. [2022-01-28 14:59:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.2891737891737893) internal successors, (2309), 702 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2309 transitions. [2022-01-28 14:59:03,012 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2309 transitions. Word has length 21 [2022-01-28 14:59:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:03,012 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2309 transitions. [2022-01-28 14:59:03,012 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) [2022-01-28 14:59:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2309 transitions. [2022-01-28 14:59:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:03,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:03,013 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:03,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Ended with exit code 0 [2022-01-28 14:59:03,213 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 [2022-01-28 14:59:03,213 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1994171153, now seen corresponding path program 482 times [2022-01-28 14:59:03,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:03,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012186071] [2022-01-28 14:59:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:03,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:03,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:03,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012186071] [2022-01-28 14:59:03,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012186071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:03,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498271012] [2022-01-28 14:59:03,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:03,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:03,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:03,320 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) [2022-01-28 14:59:03,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-01-28 14:59:03,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:03,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:03,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:03,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:03,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:03,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:03,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:03,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:03,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:03,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:03,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:03,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:03,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:03,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:03,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:03,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:03,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:03,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498271012] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:03,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:03,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:59:03,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663244143] [2022-01-28 14:59:03,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:03,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:59:03,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:03,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:59:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:03,688 INFO L87 Difference]: Start difference. First operand 703 states and 2309 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) [2022-01-28 14:59:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:03,820 INFO L93 Difference]: Finished difference Result 788 states and 2557 transitions. [2022-01-28 14:59:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:59:03,821 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 [2022-01-28 14:59:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:03,822 INFO L225 Difference]: With dead ends: 788 [2022-01-28 14:59:03,822 INFO L226 Difference]: Without dead ends: 766 [2022-01-28 14:59:03,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:03,822 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:03,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 102 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 343 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-01-28 14:59:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-01-28 14:59:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 706. [2022-01-28 14:59:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.292198581560284) internal successors, (2321), 705 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2321 transitions. [2022-01-28 14:59:03,830 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2321 transitions. Word has length 21 [2022-01-28 14:59:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:03,830 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2321 transitions. [2022-01-28 14:59:03,831 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) [2022-01-28 14:59:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2321 transitions. [2022-01-28 14:59:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:03,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:03,831 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] [2022-01-28 14:59:03,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Ended with exit code 0 [2022-01-28 14:59:04,032 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 [2022-01-28 14:59:04,032 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1217286897, now seen corresponding path program 483 times [2022-01-28 14:59:04,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:04,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143759653] [2022-01-28 14:59:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:04,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:04,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:04,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143759653] [2022-01-28 14:59:04,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143759653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:04,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969254381] [2022-01-28 14:59:04,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:04,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:04,137 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) [2022-01-28 14:59:04,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-01-28 14:59:04,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:59:04,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:04,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:04,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:04,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:04,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:04,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:04,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:04,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:04,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:04,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:04,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:04,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:04,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:04,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:04,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969254381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:04,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:04,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:04,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064913298] [2022-01-28 14:59:04,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:04,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:04,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:04,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:04,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:04,546 INFO L87 Difference]: Start difference. First operand 706 states and 2321 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) [2022-01-28 14:59:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:04,696 INFO L93 Difference]: Finished difference Result 792 states and 2547 transitions. [2022-01-28 14:59:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:59:04,696 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 [2022-01-28 14:59:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:04,697 INFO L225 Difference]: With dead ends: 792 [2022-01-28 14:59:04,697 INFO L226 Difference]: Without dead ends: 770 [2022-01-28 14:59:04,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:04,697 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:04,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 130 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 388 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-01-28 14:59:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-01-28 14:59:04,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 699. [2022-01-28 14:59:04,704 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) [2022-01-28 14:59:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2293 transitions. [2022-01-28 14:59:04,705 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2293 transitions. Word has length 21 [2022-01-28 14:59:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:04,705 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2293 transitions. [2022-01-28 14:59:04,705 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) [2022-01-28 14:59:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2293 transitions. [2022-01-28 14:59:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:04,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:04,706 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:04,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:04,906 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 [2022-01-28 14:59:04,906 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1274893994, now seen corresponding path program 484 times [2022-01-28 14:59:04,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:04,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598614207] [2022-01-28 14:59:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:04,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:05,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598614207] [2022-01-28 14:59:05,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598614207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:05,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352041826] [2022-01-28 14:59:05,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:05,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:05,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:05,031 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) [2022-01-28 14:59:05,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-01-28 14:59:05,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:05,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:05,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:05,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:05,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:05,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:05,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:05,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:05,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:05,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:05,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:05,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:05,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:05,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:05,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:05,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352041826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:05,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:05,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:05,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77580513] [2022-01-28 14:59:05,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:05,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:05,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:05,591 INFO L87 Difference]: Start difference. First operand 699 states and 2293 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) [2022-01-28 14:59:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:06,177 INFO L93 Difference]: Finished difference Result 1088 states and 3450 transitions. [2022-01-28 14:59:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:59:06,178 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 [2022-01-28 14:59:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:06,179 INFO L225 Difference]: With dead ends: 1088 [2022-01-28 14:59:06,179 INFO L226 Difference]: Without dead ends: 1069 [2022-01-28 14:59:06,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:59:06,180 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:06,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 284 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 760 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-01-28 14:59:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-28 14:59:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 700. [2022-01-28 14:59:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 3.2875536480686693) internal successors, (2298), 699 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2298 transitions. [2022-01-28 14:59:06,189 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2298 transitions. Word has length 21 [2022-01-28 14:59:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:06,189 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 2298 transitions. [2022-01-28 14:59:06,189 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) [2022-01-28 14:59:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2298 transitions. [2022-01-28 14:59:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:06,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:06,190 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:06,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Ended with exit code 0 [2022-01-28 14:59:06,390 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 [2022-01-28 14:59:06,390 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash 245707729, now seen corresponding path program 485 times [2022-01-28 14:59:06,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:06,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249252905] [2022-01-28 14:59:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:06,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:06,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:06,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249252905] [2022-01-28 14:59:06,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249252905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:06,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923897851] [2022-01-28 14:59:06,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:06,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:06,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:06,513 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) [2022-01-28 14:59:06,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-01-28 14:59:06,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:06,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:06,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:06,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:06,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:06,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:06,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:06,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:06,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:06,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:06,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:06,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:06,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:06,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:06,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:06,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:06,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923897851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:07,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:07,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:07,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561942265] [2022-01-28 14:59:07,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:07,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:07,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:07,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:07,028 INFO L87 Difference]: Start difference. First operand 700 states and 2298 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) [2022-01-28 14:59:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:07,569 INFO L93 Difference]: Finished difference Result 1192 states and 3718 transitions. [2022-01-28 14:59:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:59:07,569 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 [2022-01-28 14:59:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:07,571 INFO L225 Difference]: With dead ends: 1192 [2022-01-28 14:59:07,571 INFO L226 Difference]: Without dead ends: 1126 [2022-01-28 14:59:07,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:59:07,571 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:07,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 243 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 752 Invalid, 0 Unknown, 126 Unchecked, 0.3s Time] [2022-01-28 14:59:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2022-01-28 14:59:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 705. [2022-01-28 14:59:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.2826704545454546) internal successors, (2311), 704 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2311 transitions. [2022-01-28 14:59:07,580 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2311 transitions. Word has length 21 [2022-01-28 14:59:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:07,580 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2311 transitions. [2022-01-28 14:59:07,580 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) [2022-01-28 14:59:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2311 transitions. [2022-01-28 14:59:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:07,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:07,581 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] [2022-01-28 14:59:07,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Ended with exit code 0 [2022-01-28 14:59:07,781 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 [2022-01-28 14:59:07,781 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:07,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2022010102, now seen corresponding path program 486 times [2022-01-28 14:59:07,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:07,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097650591] [2022-01-28 14:59:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:07,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:07,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:07,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097650591] [2022-01-28 14:59:07,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097650591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:07,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403772577] [2022-01-28 14:59:07,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:07,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:07,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:07,913 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) [2022-01-28 14:59:07,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-01-28 14:59:07,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:59:07,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:07,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:07,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:08,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:08,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:08,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:08,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:08,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:08,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:08,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:08,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:08,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:08,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:08,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:08,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:08,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403772577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:08,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:08,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:08,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748638059] [2022-01-28 14:59:08,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:08,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:08,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:08,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:08,419 INFO L87 Difference]: Start difference. First operand 705 states and 2311 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) [2022-01-28 14:59:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:09,102 INFO L93 Difference]: Finished difference Result 1267 states and 3964 transitions. [2022-01-28 14:59:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 14:59:09,102 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 [2022-01-28 14:59:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:09,104 INFO L225 Difference]: With dead ends: 1267 [2022-01-28 14:59:09,104 INFO L226 Difference]: Without dead ends: 1225 [2022-01-28 14:59:09,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:59:09,104 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:09,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 383 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1111 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-01-28 14:59:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-01-28 14:59:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 712. [2022-01-28 14:59:09,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.2841068917018283) internal successors, (2335), 711 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2335 transitions. [2022-01-28 14:59:09,114 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2335 transitions. Word has length 21 [2022-01-28 14:59:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:09,114 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2335 transitions. [2022-01-28 14:59:09,114 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) [2022-01-28 14:59:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2335 transitions. [2022-01-28 14:59:09,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:09,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:09,114 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:09,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Ended with exit code 0 [2022-01-28 14:59:09,315 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 [2022-01-28 14:59:09,315 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:09,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:09,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1678860451, now seen corresponding path program 487 times [2022-01-28 14:59:09,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:09,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804940903] [2022-01-28 14:59:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:09,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:09,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:09,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804940903] [2022-01-28 14:59:09,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804940903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:09,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215602776] [2022-01-28 14:59:09,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:09,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:09,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:09,420 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) [2022-01-28 14:59:09,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-01-28 14:59:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:09,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:09,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:09,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:09,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:09,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:09,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:09,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:09,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:09,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:09,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:09,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:09,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:09,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:09,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:09,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:09,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215602776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:09,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:09,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:09,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197095218] [2022-01-28 14:59:09,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:09,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:09,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:09,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:09,867 INFO L87 Difference]: Start difference. First operand 712 states and 2335 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) [2022-01-28 14:59:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:10,041 INFO L93 Difference]: Finished difference Result 880 states and 2808 transitions. [2022-01-28 14:59:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:59:10,041 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 [2022-01-28 14:59:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:10,043 INFO L225 Difference]: With dead ends: 880 [2022-01-28 14:59:10,043 INFO L226 Difference]: Without dead ends: 836 [2022-01-28 14:59:10,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:10,043 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:10,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 151 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 441 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-28 14:59:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-01-28 14:59:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 712. [2022-01-28 14:59:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.2841068917018283) internal successors, (2335), 711 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2335 transitions. [2022-01-28 14:59:10,054 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2335 transitions. Word has length 21 [2022-01-28 14:59:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:10,054 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 2335 transitions. [2022-01-28 14:59:10,054 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) [2022-01-28 14:59:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2335 transitions. [2022-01-28 14:59:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:10,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:10,055 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] [2022-01-28 14:59:10,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Ended with exit code 0 [2022-01-28 14:59:10,277 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 [2022-01-28 14:59:10,277 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:10,278 INFO L85 PathProgramCache]: Analyzing trace with hash 24520218, now seen corresponding path program 488 times [2022-01-28 14:59:10,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:10,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064525880] [2022-01-28 14:59:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:10,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:10,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:10,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064525880] [2022-01-28 14:59:10,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064525880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:10,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560788596] [2022-01-28 14:59:10,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:10,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:10,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:10,405 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) [2022-01-28 14:59:10,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-01-28 14:59:10,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:10,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:10,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:10,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:10,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:10,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:10,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:10,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:10,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:10,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:10,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:10,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:10,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:10,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:10,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:10,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560788596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:10,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:10,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:10,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804848121] [2022-01-28 14:59:10,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:10,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:10,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:10,910 INFO L87 Difference]: Start difference. First operand 712 states and 2335 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) [2022-01-28 14:59:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:11,453 INFO L93 Difference]: Finished difference Result 1060 states and 3363 transitions. [2022-01-28 14:59:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:59:11,453 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 [2022-01-28 14:59:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:11,455 INFO L225 Difference]: With dead ends: 1060 [2022-01-28 14:59:11,455 INFO L226 Difference]: Without dead ends: 1041 [2022-01-28 14:59:11,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:59:11,455 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:11,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 322 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 856 Invalid, 0 Unknown, 227 Unchecked, 0.3s Time] [2022-01-28 14:59:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-01-28 14:59:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 714. [2022-01-28 14:59:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.2847124824684433) internal successors, (2342), 713 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2342 transitions. [2022-01-28 14:59:11,470 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2342 transitions. Word has length 21 [2022-01-28 14:59:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:11,471 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2342 transitions. [2022-01-28 14:59:11,471 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) [2022-01-28 14:59:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2342 transitions. [2022-01-28 14:59:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:11,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:11,472 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:11,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Ended with exit code 0 [2022-01-28 14:59:11,672 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 [2022-01-28 14:59:11,672 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2022834726, now seen corresponding path program 489 times [2022-01-28 14:59:11,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607010224] [2022-01-28 14:59:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:11,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:11,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:11,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607010224] [2022-01-28 14:59:11,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607010224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:11,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631355346] [2022-01-28 14:59:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:11,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:11,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:11,805 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) [2022-01-28 14:59:11,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-01-28 14:59:11,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:59:11,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:11,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:59:11,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:11,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:11,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:12,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:12,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:12,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:12,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:12,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:12,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:12,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:12,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:12,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:12,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:12,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:12,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631355346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:12,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:12,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:12,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636176102] [2022-01-28 14:59:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:12,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:12,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:12,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:12,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:12,490 INFO L87 Difference]: Start difference. First operand 714 states and 2342 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) [2022-01-28 14:59:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:13,201 INFO L93 Difference]: Finished difference Result 1181 states and 3701 transitions. [2022-01-28 14:59:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:59:13,201 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 [2022-01-28 14:59:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:13,203 INFO L225 Difference]: With dead ends: 1181 [2022-01-28 14:59:13,203 INFO L226 Difference]: Without dead ends: 1124 [2022-01-28 14:59:13,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:59:13,203 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 129 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:13,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 336 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 811 Invalid, 0 Unknown, 207 Unchecked, 0.3s Time] [2022-01-28 14:59:13,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-01-28 14:59:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 714. [2022-01-28 14:59:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.2847124824684433) internal successors, (2342), 713 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2342 transitions. [2022-01-28 14:59:13,212 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2342 transitions. Word has length 21 [2022-01-28 14:59:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:13,212 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2342 transitions. [2022-01-28 14:59:13,212 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) [2022-01-28 14:59:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2342 transitions. [2022-01-28 14:59:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:13,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:13,213 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:13,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Ended with exit code 0 [2022-01-28 14:59:13,413 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 [2022-01-28 14:59:13,414 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1685481103, now seen corresponding path program 490 times [2022-01-28 14:59:13,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:13,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751296126] [2022-01-28 14:59:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:13,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:13,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751296126] [2022-01-28 14:59:13,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751296126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156102415] [2022-01-28 14:59:13,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:13,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:13,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:13,519 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) [2022-01-28 14:59:13,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-01-28 14:59:13,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:13,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:13,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:13,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:13,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:13,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:13,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:13,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:13,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:13,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:13,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:13,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:13,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:13,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:13,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:13,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:13,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156102415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:13,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:13,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:13,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597611717] [2022-01-28 14:59:13,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:13,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:13,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:13,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:13,975 INFO L87 Difference]: Start difference. First operand 714 states and 2342 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) [2022-01-28 14:59:14,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:14,144 INFO L93 Difference]: Finished difference Result 850 states and 2721 transitions. [2022-01-28 14:59:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:59:14,144 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 [2022-01-28 14:59:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:14,145 INFO L225 Difference]: With dead ends: 850 [2022-01-28 14:59:14,145 INFO L226 Difference]: Without dead ends: 828 [2022-01-28 14:59:14,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:14,146 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:14,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 174 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 456 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-01-28 14:59:14,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-28 14:59:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 714. [2022-01-28 14:59:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.2847124824684433) internal successors, (2342), 713 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2342 transitions. [2022-01-28 14:59:14,154 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2342 transitions. Word has length 21 [2022-01-28 14:59:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:14,154 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2342 transitions. [2022-01-28 14:59:14,154 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) [2022-01-28 14:59:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2342 transitions. [2022-01-28 14:59:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:14,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:14,155 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] [2022-01-28 14:59:14,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:14,355 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 [2022-01-28 14:59:14,355 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1202213905, now seen corresponding path program 491 times [2022-01-28 14:59:14,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:14,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775152079] [2022-01-28 14:59:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:14,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:14,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775152079] [2022-01-28 14:59:14,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775152079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755516929] [2022-01-28 14:59:14,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:14,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:14,493 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) [2022-01-28 14:59:14,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-01-28 14:59:14,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:59:14,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:14,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:14,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:14,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:14,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:14,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:14,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:14,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:14,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:14,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:14,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:14,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:14,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:14,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:14,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:15,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755516929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:15,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:15,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:15,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014841233] [2022-01-28 14:59:15,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:15,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:15,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:15,003 INFO L87 Difference]: Start difference. First operand 714 states and 2342 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) [2022-01-28 14:59:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:15,672 INFO L93 Difference]: Finished difference Result 1263 states and 3914 transitions. [2022-01-28 14:59:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:59:15,672 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 [2022-01-28 14:59:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:15,674 INFO L225 Difference]: With dead ends: 1263 [2022-01-28 14:59:15,674 INFO L226 Difference]: Without dead ends: 1209 [2022-01-28 14:59:15,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:59:15,675 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 119 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:15,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 255 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 696 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-01-28 14:59:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-01-28 14:59:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 721. [2022-01-28 14:59:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.297222222222222) internal successors, (2374), 720 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2374 transitions. [2022-01-28 14:59:15,684 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2374 transitions. Word has length 21 [2022-01-28 14:59:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:15,684 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 2374 transitions. [2022-01-28 14:59:15,684 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) [2022-01-28 14:59:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2374 transitions. [2022-01-28 14:59:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:15,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:15,690 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] [2022-01-28 14:59:15,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Ended with exit code 0 [2022-01-28 14:59:15,890 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 [2022-01-28 14:59:15,890 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2045735814, now seen corresponding path program 492 times [2022-01-28 14:59:15,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:15,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682987731] [2022-01-28 14:59:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:15,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:15,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682987731] [2022-01-28 14:59:15,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682987731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:15,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582961324] [2022-01-28 14:59:15,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:15,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:15,995 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) [2022-01-28 14:59:15,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-01-28 14:59:16,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:59:16,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:16,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:16,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:16,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:16,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:16,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:16,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:16,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:16,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:16,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:16,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:16,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:16,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:16,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:16,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582961324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:16,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:16,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:16,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533496966] [2022-01-28 14:59:16,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:16,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:16,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:16,457 INFO L87 Difference]: Start difference. First operand 721 states and 2374 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) [2022-01-28 14:59:16,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:16,979 INFO L93 Difference]: Finished difference Result 1137 states and 3610 transitions. [2022-01-28 14:59:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:59:16,979 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 [2022-01-28 14:59:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:16,981 INFO L225 Difference]: With dead ends: 1137 [2022-01-28 14:59:16,981 INFO L226 Difference]: Without dead ends: 1114 [2022-01-28 14:59:16,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:59:16,981 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:16,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 251 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 822 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-01-28 14:59:16,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-01-28 14:59:16,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 723. [2022-01-28 14:59:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.2977839335180055) internal successors, (2381), 722 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2381 transitions. [2022-01-28 14:59:16,991 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2381 transitions. Word has length 21 [2022-01-28 14:59:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:16,991 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 2381 transitions. [2022-01-28 14:59:16,991 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) [2022-01-28 14:59:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2381 transitions. [2022-01-28 14:59:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:16,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:16,992 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] [2022-01-28 14:59:17,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Ended with exit code 0 [2022-01-28 14:59:17,192 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 [2022-01-28 14:59:17,192 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:17,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1811692511, now seen corresponding path program 493 times [2022-01-28 14:59:17,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:17,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619322591] [2022-01-28 14:59:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:17,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:17,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:17,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619322591] [2022-01-28 14:59:17,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619322591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:17,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77935339] [2022-01-28 14:59:17,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:17,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:17,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:17,306 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) [2022-01-28 14:59:17,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-01-28 14:59:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:17,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:17,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:17,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:17,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:17,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:17,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:17,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:17,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:17,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:17,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:17,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:17,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:17,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:17,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:17,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:17,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77935339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:17,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:17,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:59:17,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436207960] [2022-01-28 14:59:17,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:17,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:59:17,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:59:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:17,689 INFO L87 Difference]: Start difference. First operand 723 states and 2381 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) [2022-01-28 14:59:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:17,877 INFO L93 Difference]: Finished difference Result 851 states and 2758 transitions. [2022-01-28 14:59:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:59:17,877 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 [2022-01-28 14:59:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:17,879 INFO L225 Difference]: With dead ends: 851 [2022-01-28 14:59:17,879 INFO L226 Difference]: Without dead ends: 815 [2022-01-28 14:59:17,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:17,879 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:17,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 139 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 471 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-01-28 14:59:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-01-28 14:59:17,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 718. [2022-01-28 14:59:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 3.295676429567643) internal successors, (2363), 717 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) [2022-01-28 14:59:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2363 transitions. [2022-01-28 14:59:17,886 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2363 transitions. Word has length 21 [2022-01-28 14:59:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:17,887 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 2363 transitions. [2022-01-28 14:59:17,887 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) [2022-01-28 14:59:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2363 transitions. [2022-01-28 14:59:17,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:17,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:17,888 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] [2022-01-28 14:59:17,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:18,088 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 [2022-01-28 14:59:18,088 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash 805117535, now seen corresponding path program 494 times [2022-01-28 14:59:18,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:18,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986953862] [2022-01-28 14:59:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:18,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:18,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:18,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986953862] [2022-01-28 14:59:18,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986953862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:18,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488021535] [2022-01-28 14:59:18,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:18,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:18,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:18,227 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) [2022-01-28 14:59:18,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-01-28 14:59:18,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:18,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:18,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:18,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:18,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:18,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:18,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:18,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:18,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:18,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:18,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:18,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:18,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:18,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:18,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:18,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:18,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:18,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488021535] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:18,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:18,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:18,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285467767] [2022-01-28 14:59:18,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:18,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:18,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:18,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:18,720 INFO L87 Difference]: Start difference. First operand 718 states and 2363 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) [2022-01-28 14:59:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:19,273 INFO L93 Difference]: Finished difference Result 1202 states and 3756 transitions. [2022-01-28 14:59:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:59:19,274 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 [2022-01-28 14:59:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:19,275 INFO L225 Difference]: With dead ends: 1202 [2022-01-28 14:59:19,275 INFO L226 Difference]: Without dead ends: 1181 [2022-01-28 14:59:19,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:59:19,276 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:19,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 284 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 865 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-01-28 14:59:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-01-28 14:59:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 714. [2022-01-28 14:59:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.2847124824684433) internal successors, (2342), 713 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2342 transitions. [2022-01-28 14:59:19,285 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2342 transitions. Word has length 21 [2022-01-28 14:59:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:19,285 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2342 transitions. [2022-01-28 14:59:19,285 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) [2022-01-28 14:59:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2342 transitions. [2022-01-28 14:59:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:19,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:19,286 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:19,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Ended with exit code 0 [2022-01-28 14:59:19,486 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 [2022-01-28 14:59:19,486 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:19,487 INFO L85 PathProgramCache]: Analyzing trace with hash -110960820, now seen corresponding path program 495 times [2022-01-28 14:59:19,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:19,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168012129] [2022-01-28 14:59:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:19,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:19,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168012129] [2022-01-28 14:59:19,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168012129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760016437] [2022-01-28 14:59:19,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:19,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:19,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:19,614 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) [2022-01-28 14:59:19,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-01-28 14:59:19,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:59:19,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:19,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:19,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:19,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:19,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:19,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:19,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:19,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:19,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:19,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:19,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:19,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:20,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:20,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:20,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:20,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:20,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760016437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:20,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:20,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:20,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69417173] [2022-01-28 14:59:20,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:20,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:20,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:20,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:20,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:20,105 INFO L87 Difference]: Start difference. First operand 714 states and 2342 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) [2022-01-28 14:59:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:20,619 INFO L93 Difference]: Finished difference Result 1134 states and 3567 transitions. [2022-01-28 14:59:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:59:20,619 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 [2022-01-28 14:59:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:20,621 INFO L225 Difference]: With dead ends: 1134 [2022-01-28 14:59:20,621 INFO L226 Difference]: Without dead ends: 1084 [2022-01-28 14:59:20,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:59:20,621 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:20,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 258 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 749 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2022-01-28 14:59:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-01-28 14:59:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 719. [2022-01-28 14:59:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.285515320334262) internal successors, (2359), 718 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2359 transitions. [2022-01-28 14:59:20,630 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2359 transitions. Word has length 21 [2022-01-28 14:59:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:20,631 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 2359 transitions. [2022-01-28 14:59:20,631 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) [2022-01-28 14:59:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2359 transitions. [2022-01-28 14:59:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:20,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:20,632 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:20,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:20,832 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 [2022-01-28 14:59:20,832 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash 492280177, now seen corresponding path program 496 times [2022-01-28 14:59:20,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217793036] [2022-01-28 14:59:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:20,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:20,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:20,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217793036] [2022-01-28 14:59:20,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217793036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:20,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552062164] [2022-01-28 14:59:20,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:20,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:20,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:20,974 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) [2022-01-28 14:59:20,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-01-28 14:59:20,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:20,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:20,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:20,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:21,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:21,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:21,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:21,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:21,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:21,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:21,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:21,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:21,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:21,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:21,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:21,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:21,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552062164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:21,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:21,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:21,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056552797] [2022-01-28 14:59:21,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:21,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:21,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:21,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:21,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:21,478 INFO L87 Difference]: Start difference. First operand 719 states and 2359 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) [2022-01-28 14:59:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:21,994 INFO L93 Difference]: Finished difference Result 1138 states and 3592 transitions. [2022-01-28 14:59:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:59:21,994 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 [2022-01-28 14:59:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:21,995 INFO L225 Difference]: With dead ends: 1138 [2022-01-28 14:59:21,996 INFO L226 Difference]: Without dead ends: 1111 [2022-01-28 14:59:21,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:59:21,996 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:21,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 275 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 728 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2022-01-28 14:59:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-28 14:59:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 719. [2022-01-28 14:59:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.285515320334262) internal successors, (2359), 718 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:22,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2359 transitions. [2022-01-28 14:59:22,005 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2359 transitions. Word has length 21 [2022-01-28 14:59:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:22,005 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 2359 transitions. [2022-01-28 14:59:22,005 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) [2022-01-28 14:59:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2359 transitions. [2022-01-28 14:59:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:22,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:22,006 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:22,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Ended with exit code 0 [2022-01-28 14:59:22,206 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 [2022-01-28 14:59:22,206 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:22,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:22,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1300338100, now seen corresponding path program 497 times [2022-01-28 14:59:22,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:22,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841219013] [2022-01-28 14:59:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:22,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:22,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:22,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841219013] [2022-01-28 14:59:22,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841219013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:22,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375682282] [2022-01-28 14:59:22,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:22,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:22,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:22,302 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) [2022-01-28 14:59:22,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-01-28 14:59:22,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:22,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:22,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:22,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:22,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:22,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:22,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:22,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:22,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:22,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:22,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:22,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:22,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:22,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:22,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:22,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:22,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375682282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:22,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:22,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:22,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721969243] [2022-01-28 14:59:22,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:22,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:22,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:22,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:22,783 INFO L87 Difference]: Start difference. First operand 719 states and 2359 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) [2022-01-28 14:59:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:23,238 INFO L93 Difference]: Finished difference Result 1042 states and 3321 transitions. [2022-01-28 14:59:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:59:23,238 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 [2022-01-28 14:59:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:23,245 INFO L225 Difference]: With dead ends: 1042 [2022-01-28 14:59:23,246 INFO L226 Difference]: Without dead ends: 1015 [2022-01-28 14:59:23,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:59:23,246 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:23,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 230 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 730 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-01-28 14:59:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-01-28 14:59:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 719. [2022-01-28 14:59:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.2827298050139277) internal successors, (2357), 718 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2357 transitions. [2022-01-28 14:59:23,255 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2357 transitions. Word has length 21 [2022-01-28 14:59:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:23,255 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 2357 transitions. [2022-01-28 14:59:23,255 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) [2022-01-28 14:59:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2357 transitions. [2022-01-28 14:59:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:23,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:23,256 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] [2022-01-28 14:59:23,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Ended with exit code 0 [2022-01-28 14:59:23,456 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 [2022-01-28 14:59:23,456 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:23,456 INFO L85 PathProgramCache]: Analyzing trace with hash -505783023, now seen corresponding path program 498 times [2022-01-28 14:59:23,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:23,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163590402] [2022-01-28 14:59:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:23,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:23,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163590402] [2022-01-28 14:59:23,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163590402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896977281] [2022-01-28 14:59:23,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:23,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:23,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:23,586 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) [2022-01-28 14:59:23,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-01-28 14:59:23,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:59:23,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:23,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:23,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:23,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:23,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:23,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:23,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:23,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:23,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:23,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:23,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:23,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:24,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:24,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:24,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:24,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:24,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896977281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:24,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:24,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:24,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229282767] [2022-01-28 14:59:24,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:24,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:24,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:24,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:24,089 INFO L87 Difference]: Start difference. First operand 719 states and 2357 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) [2022-01-28 14:59:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:24,561 INFO L93 Difference]: Finished difference Result 1081 states and 3432 transitions. [2022-01-28 14:59:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:59:24,561 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 [2022-01-28 14:59:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:24,563 INFO L225 Difference]: With dead ends: 1081 [2022-01-28 14:59:24,563 INFO L226 Difference]: Without dead ends: 1060 [2022-01-28 14:59:24,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:59:24,563 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 88 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:24,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 208 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 549 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-01-28 14:59:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-01-28 14:59:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 717. [2022-01-28 14:59:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.2849162011173183) internal successors, (2352), 716 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2352 transitions. [2022-01-28 14:59:24,572 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2352 transitions. Word has length 21 [2022-01-28 14:59:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:24,572 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2352 transitions. [2022-01-28 14:59:24,573 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) [2022-01-28 14:59:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2352 transitions. [2022-01-28 14:59:24,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:24,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:24,573 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] [2022-01-28 14:59:24,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Ended with exit code 0 [2022-01-28 14:59:24,774 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 [2022-01-28 14:59:24,774 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:24,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1452173671, now seen corresponding path program 499 times [2022-01-28 14:59:24,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:24,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262792831] [2022-01-28 14:59:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:24,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:24,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:24,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262792831] [2022-01-28 14:59:24,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262792831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:24,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254694800] [2022-01-28 14:59:24,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:24,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:24,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:24,888 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) [2022-01-28 14:59:24,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-01-28 14:59:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:24,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:24,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:24,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:24,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:25,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:25,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:25,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:25,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:25,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:25,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:25,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:25,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:25,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:25,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:25,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:25,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254694800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:25,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:25,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:59:25,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867934335] [2022-01-28 14:59:25,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:25,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:59:25,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:59:25,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:25,276 INFO L87 Difference]: Start difference. First operand 717 states and 2352 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) [2022-01-28 14:59:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:25,454 INFO L93 Difference]: Finished difference Result 810 states and 2630 transitions. [2022-01-28 14:59:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:59:25,454 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 [2022-01-28 14:59:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:25,456 INFO L225 Difference]: With dead ends: 810 [2022-01-28 14:59:25,456 INFO L226 Difference]: Without dead ends: 788 [2022-01-28 14:59:25,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:25,456 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:25,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 159 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 484 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-01-28 14:59:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-28 14:59:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 720. [2022-01-28 14:59:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 3.2878998609179417) internal successors, (2364), 719 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2364 transitions. [2022-01-28 14:59:25,463 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2364 transitions. Word has length 21 [2022-01-28 14:59:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:25,464 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 2364 transitions. [2022-01-28 14:59:25,464 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) [2022-01-28 14:59:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2364 transitions. [2022-01-28 14:59:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:25,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:25,464 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:25,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Ended with exit code 0 [2022-01-28 14:59:25,665 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 [2022-01-28 14:59:25,665 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:25,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:25,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2065909369, now seen corresponding path program 500 times [2022-01-28 14:59:25,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:25,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659366861] [2022-01-28 14:59:25,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:25,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:25,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:25,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659366861] [2022-01-28 14:59:25,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659366861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:25,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213756515] [2022-01-28 14:59:25,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:25,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:25,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:25,776 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) [2022-01-28 14:59:25,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-01-28 14:59:25,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:25,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:25,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:25,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:25,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:26,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:26,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:26,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:26,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:26,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:26,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:26,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:26,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:26,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:26,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:26,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213756515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:26,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:26,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:26,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802158918] [2022-01-28 14:59:26,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:26,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:26,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:26,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:26,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:26,212 INFO L87 Difference]: Start difference. First operand 720 states and 2364 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) [2022-01-28 14:59:26,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:26,384 INFO L93 Difference]: Finished difference Result 856 states and 2724 transitions. [2022-01-28 14:59:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:59:26,385 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 [2022-01-28 14:59:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:26,386 INFO L225 Difference]: With dead ends: 856 [2022-01-28 14:59:26,386 INFO L226 Difference]: Without dead ends: 812 [2022-01-28 14:59:26,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:26,386 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:26,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 159 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 404 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-28 14:59:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-28 14:59:26,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 717. [2022-01-28 14:59:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.2849162011173183) internal successors, (2352), 716 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2352 transitions. [2022-01-28 14:59:26,395 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2352 transitions. Word has length 21 [2022-01-28 14:59:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:26,395 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2352 transitions. [2022-01-28 14:59:26,395 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) [2022-01-28 14:59:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2352 transitions. [2022-01-28 14:59:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:26,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:26,396 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:26,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Ended with exit code 0 [2022-01-28 14:59:26,596 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 [2022-01-28 14:59:26,596 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:26,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1188453392, now seen corresponding path program 501 times [2022-01-28 14:59:26,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:26,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805303599] [2022-01-28 14:59:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:26,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:26,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:26,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805303599] [2022-01-28 14:59:26,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805303599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:26,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726889753] [2022-01-28 14:59:26,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:26,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:26,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:26,732 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) [2022-01-28 14:59:26,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-01-28 14:59:26,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:59:26,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:26,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:26,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:26,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:26,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:26,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:26,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:26,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:26,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:26,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:27,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:27,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:27,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:27,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:27,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:27,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:27,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726889753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:27,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:27,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:27,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150418527] [2022-01-28 14:59:27,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:27,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:27,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:27,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:27,203 INFO L87 Difference]: Start difference. First operand 717 states and 2352 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) [2022-01-28 14:59:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:27,825 INFO L93 Difference]: Finished difference Result 1173 states and 3658 transitions. [2022-01-28 14:59:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:59:27,825 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 [2022-01-28 14:59:27,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:27,827 INFO L225 Difference]: With dead ends: 1173 [2022-01-28 14:59:27,827 INFO L226 Difference]: Without dead ends: 1127 [2022-01-28 14:59:27,828 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 [2022-01-28 14:59:27,828 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 117 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:27,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 305 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 873 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-01-28 14:59:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-28 14:59:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 721. [2022-01-28 14:59:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.2888888888888888) internal successors, (2368), 720 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2368 transitions. [2022-01-28 14:59:27,837 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2368 transitions. Word has length 21 [2022-01-28 14:59:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:27,837 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 2368 transitions. [2022-01-28 14:59:27,838 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) [2022-01-28 14:59:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2368 transitions. [2022-01-28 14:59:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:27,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:27,838 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] [2022-01-28 14:59:27,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Ended with exit code 0 [2022-01-28 14:59:28,039 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 [2022-01-28 14:59:28,039 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1791694389, now seen corresponding path program 502 times [2022-01-28 14:59:28,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:28,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855833758] [2022-01-28 14:59:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:28,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:28,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:28,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855833758] [2022-01-28 14:59:28,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855833758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:28,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748918560] [2022-01-28 14:59:28,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:28,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:28,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:28,175 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) [2022-01-28 14:59:28,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-01-28 14:59:28,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:28,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:28,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:28,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:28,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:28,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:28,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:28,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:28,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:28,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:28,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:28,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:28,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:28,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:28,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:28,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748918560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:28,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:28,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:28,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721906373] [2022-01-28 14:59:28,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:28,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:28,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:28,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:28,656 INFO L87 Difference]: Start difference. First operand 721 states and 2368 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) [2022-01-28 14:59:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:29,270 INFO L93 Difference]: Finished difference Result 1153 states and 3637 transitions. [2022-01-28 14:59:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 14:59:29,270 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 [2022-01-28 14:59:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:29,272 INFO L225 Difference]: With dead ends: 1153 [2022-01-28 14:59:29,272 INFO L226 Difference]: Without dead ends: 1126 [2022-01-28 14:59:29,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:59:29,272 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:29,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 226 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 693 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-01-28 14:59:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2022-01-28 14:59:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 722. [2022-01-28 14:59:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 3.292649098474341) internal successors, (2374), 721 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2374 transitions. [2022-01-28 14:59:29,281 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2374 transitions. Word has length 21 [2022-01-28 14:59:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:29,281 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 2374 transitions. [2022-01-28 14:59:29,281 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) [2022-01-28 14:59:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2374 transitions. [2022-01-28 14:59:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:29,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:29,282 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:29,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Ended with exit code 0 [2022-01-28 14:59:29,483 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 [2022-01-28 14:59:29,483 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1348663517, now seen corresponding path program 503 times [2022-01-28 14:59:29,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:29,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831272604] [2022-01-28 14:59:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:29,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:29,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831272604] [2022-01-28 14:59:29,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831272604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701568348] [2022-01-28 14:59:29,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:29,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:29,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:29,594 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) [2022-01-28 14:59:29,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-01-28 14:59:29,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:29,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:29,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:29,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:29,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:29,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:29,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:29,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:29,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:29,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:29,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:29,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:29,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:29,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:29,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:29,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:29,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701568348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:29,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:29,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:59:29,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030741550] [2022-01-28 14:59:29,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:29,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:59:29,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:29,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:59:29,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:29,970 INFO L87 Difference]: Start difference. First operand 722 states and 2374 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) [2022-01-28 14:59:30,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:30,127 INFO L93 Difference]: Finished difference Result 841 states and 2720 transitions. [2022-01-28 14:59:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:59:30,127 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 [2022-01-28 14:59:30,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:30,128 INFO L225 Difference]: With dead ends: 841 [2022-01-28 14:59:30,128 INFO L226 Difference]: Without dead ends: 812 [2022-01-28 14:59:30,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:30,129 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:30,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 120 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 418 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-01-28 14:59:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-28 14:59:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 721. [2022-01-28 14:59:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.2888888888888888) internal successors, (2368), 720 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2368 transitions. [2022-01-28 14:59:30,136 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2368 transitions. Word has length 21 [2022-01-28 14:59:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:30,136 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 2368 transitions. [2022-01-28 14:59:30,137 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) [2022-01-28 14:59:30,137 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2368 transitions. [2022-01-28 14:59:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:30,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:30,137 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:30,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Ended with exit code 0 [2022-01-28 14:59:30,338 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 [2022-01-28 14:59:30,338 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1781861515, now seen corresponding path program 504 times [2022-01-28 14:59:30,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:30,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30862835] [2022-01-28 14:59:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:30,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:30,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:30,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30862835] [2022-01-28 14:59:30,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30862835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:30,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715772630] [2022-01-28 14:59:30,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:30,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:30,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:30,454 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) [2022-01-28 14:59:30,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Waiting until timeout for monitored process [2022-01-28 14:59:30,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:59:30,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:30,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:30,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:30,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:30,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:30,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:30,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:30,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:30,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:30,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:30,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:30,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:30,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:30,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:30,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:30,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:30,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715772630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:30,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:30,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:30,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252124244] [2022-01-28 14:59:30,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:30,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:30,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:30,909 INFO L87 Difference]: Start difference. First operand 721 states and 2368 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) [2022-01-28 14:59:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:31,109 INFO L93 Difference]: Finished difference Result 835 states and 2676 transitions. [2022-01-28 14:59:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:59:31,109 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 [2022-01-28 14:59:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:31,111 INFO L225 Difference]: With dead ends: 835 [2022-01-28 14:59:31,111 INFO L226 Difference]: Without dead ends: 813 [2022-01-28 14:59:31,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:31,111 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:31,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 177 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 484 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-01-28 14:59:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-28 14:59:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 721. [2022-01-28 14:59:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.2888888888888888) internal successors, (2368), 720 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2368 transitions. [2022-01-28 14:59:31,119 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2368 transitions. Word has length 21 [2022-01-28 14:59:31,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:31,119 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 2368 transitions. [2022-01-28 14:59:31,119 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) [2022-01-28 14:59:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2368 transitions. [2022-01-28 14:59:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:31,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:31,120 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] [2022-01-28 14:59:31,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:31,320 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 [2022-01-28 14:59:31,320 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1678482751, now seen corresponding path program 505 times [2022-01-28 14:59:31,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:31,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134400724] [2022-01-28 14:59:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:31,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:31,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:31,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134400724] [2022-01-28 14:59:31,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134400724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:31,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940360002] [2022-01-28 14:59:31,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:31,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:31,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:31,429 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) [2022-01-28 14:59:31,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Waiting until timeout for monitored process [2022-01-28 14:59:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:31,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:31,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:31,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:31,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:31,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:31,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:31,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:31,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:31,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:31,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:31,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:31,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:31,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:31,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:31,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940360002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:31,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:31,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 14:59:31,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128853205] [2022-01-28 14:59:31,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:31,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 14:59:31,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 14:59:31,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:31,842 INFO L87 Difference]: Start difference. First operand 721 states and 2368 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) [2022-01-28 14:59:31,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:31,984 INFO L93 Difference]: Finished difference Result 898 states and 2869 transitions. [2022-01-28 14:59:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:59:31,984 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 [2022-01-28 14:59:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:31,985 INFO L225 Difference]: With dead ends: 898 [2022-01-28 14:59:31,985 INFO L226 Difference]: Without dead ends: 869 [2022-01-28 14:59:31,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 14:59:31,985 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:31,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 173 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 330 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-01-28 14:59:31,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-01-28 14:59:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 732. [2022-01-28 14:59:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.2859097127222983) internal successors, (2402), 731 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2402 transitions. [2022-01-28 14:59:31,994 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2402 transitions. Word has length 21 [2022-01-28 14:59:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:31,994 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2402 transitions. [2022-01-28 14:59:31,994 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) [2022-01-28 14:59:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2402 transitions. [2022-01-28 14:59:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:31,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:31,995 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] [2022-01-28 14:59:32,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Ended with exit code 0 [2022-01-28 14:59:32,195 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 [2022-01-28 14:59:32,195 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1609177592, now seen corresponding path program 506 times [2022-01-28 14:59:32,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:32,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382268632] [2022-01-28 14:59:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:32,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:32,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:32,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382268632] [2022-01-28 14:59:32,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382268632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:32,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520949531] [2022-01-28 14:59:32,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:32,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:32,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:32,331 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) [2022-01-28 14:59:32,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Waiting until timeout for monitored process [2022-01-28 14:59:32,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:32,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:32,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:32,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:32,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:32,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:32,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:32,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:32,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:32,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:32,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:32,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:32,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:32,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:32,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:32,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:32,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520949531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:32,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:32,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:32,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351006852] [2022-01-28 14:59:32,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:32,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:32,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:32,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:32,826 INFO L87 Difference]: Start difference. First operand 732 states and 2402 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) [2022-01-28 14:59:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:33,391 INFO L93 Difference]: Finished difference Result 1126 states and 3537 transitions. [2022-01-28 14:59:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 14:59:33,392 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 [2022-01-28 14:59:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:33,393 INFO L225 Difference]: With dead ends: 1126 [2022-01-28 14:59:33,393 INFO L226 Difference]: Without dead ends: 1107 [2022-01-28 14:59:33,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:59:33,393 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:33,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 304 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 879 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2022-01-28 14:59:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-01-28 14:59:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 724. [2022-01-28 14:59:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 3.2863070539419086) internal successors, (2376), 723 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) [2022-01-28 14:59:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2376 transitions. [2022-01-28 14:59:33,409 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2376 transitions. Word has length 21 [2022-01-28 14:59:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:33,409 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 2376 transitions. [2022-01-28 14:59:33,409 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) [2022-01-28 14:59:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2376 transitions. [2022-01-28 14:59:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:33,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:33,410 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] [2022-01-28 14:59:33,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Ended with exit code 0 [2022-01-28 14:59:33,611 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 [2022-01-28 14:59:33,611 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:33,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:33,611 INFO L85 PathProgramCache]: Analyzing trace with hash -278561643, now seen corresponding path program 507 times [2022-01-28 14:59:33,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:33,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707976398] [2022-01-28 14:59:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:33,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:33,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:33,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707976398] [2022-01-28 14:59:33,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707976398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:33,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891365378] [2022-01-28 14:59:33,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:33,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:33,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:33,745 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) [2022-01-28 14:59:33,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Waiting until timeout for monitored process [2022-01-28 14:59:33,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:59:33,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:33,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:59:33,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:33,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:33,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:34,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:34,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:34,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:34,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:34,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:34,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:34,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:34,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:34,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:34,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:34,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:34,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891365378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:34,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:34,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-28 14:59:34,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237456501] [2022-01-28 14:59:34,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:34,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:59:34,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:34,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:59:34,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:59:34,404 INFO L87 Difference]: Start difference. First operand 724 states and 2376 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) [2022-01-28 14:59:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:35,014 INFO L93 Difference]: Finished difference Result 1058 states and 3366 transitions. [2022-01-28 14:59:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:59:35,014 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 [2022-01-28 14:59:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:35,016 INFO L225 Difference]: With dead ends: 1058 [2022-01-28 14:59:35,016 INFO L226 Difference]: Without dead ends: 1016 [2022-01-28 14:59:35,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:59:35,016 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:35,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 264 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 781 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-01-28 14:59:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-28 14:59:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 732. [2022-01-28 14:59:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.295485636114911) internal successors, (2409), 731 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) [2022-01-28 14:59:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2409 transitions. [2022-01-28 14:59:35,025 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2409 transitions. Word has length 21 [2022-01-28 14:59:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:35,025 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2409 transitions. [2022-01-28 14:59:35,025 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) [2022-01-28 14:59:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2409 transitions. [2022-01-28 14:59:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:35,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:35,026 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] [2022-01-28 14:59:35,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Ended with exit code 0 [2022-01-28 14:59:35,226 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 [2022-01-28 14:59:35,227 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:35,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1055445899, now seen corresponding path program 508 times [2022-01-28 14:59:35,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:35,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2590218] [2022-01-28 14:59:35,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:35,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:35,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2590218] [2022-01-28 14:59:35,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2590218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:35,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013152643] [2022-01-28 14:59:35,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:35,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:35,359 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) [2022-01-28 14:59:35,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Waiting until timeout for monitored process [2022-01-28 14:59:35,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:35,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:35,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:35,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:35,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:35,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:35,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:35,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:35,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:35,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:35,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:35,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:35,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:35,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:35,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:35,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:35,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013152643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:35,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:35,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:35,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600151828] [2022-01-28 14:59:35,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:35,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:35,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:35,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:35,850 INFO L87 Difference]: Start difference. First operand 732 states and 2409 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) [2022-01-28 14:59:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:36,287 INFO L93 Difference]: Finished difference Result 1057 states and 3371 transitions. [2022-01-28 14:59:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:59:36,288 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 [2022-01-28 14:59:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:36,289 INFO L225 Difference]: With dead ends: 1057 [2022-01-28 14:59:36,289 INFO L226 Difference]: Without dead ends: 1036 [2022-01-28 14:59:36,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:59:36,289 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 110 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:36,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 231 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 671 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2022-01-28 14:59:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-01-28 14:59:36,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 729. [2022-01-28 14:59:36,304 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) [2022-01-28 14:59:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2397 transitions. [2022-01-28 14:59:36,305 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2397 transitions. Word has length 21 [2022-01-28 14:59:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:36,305 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 2397 transitions. [2022-01-28 14:59:36,305 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) [2022-01-28 14:59:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2397 transitions. [2022-01-28 14:59:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:36,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:36,306 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] [2022-01-28 14:59:36,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Ended with exit code 0 [2022-01-28 14:59:36,506 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 [2022-01-28 14:59:36,506 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 317544273, now seen corresponding path program 509 times [2022-01-28 14:59:36,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:36,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697525787] [2022-01-28 14:59:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:36,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:36,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697525787] [2022-01-28 14:59:36,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697525787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7883523] [2022-01-28 14:59:36,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:36,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:36,644 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) [2022-01-28 14:59:36,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Waiting until timeout for monitored process [2022-01-28 14:59:36,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:59:36,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:36,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:36,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:36,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:36,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:36,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:36,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:36,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:36,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:36,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:36,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:37,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:37,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:37,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:37,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:37,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7883523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:37,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:37,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:37,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494887736] [2022-01-28 14:59:37,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:37,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:37,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:37,121 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) [2022-01-28 14:59:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:37,634 INFO L93 Difference]: Finished difference Result 1007 states and 3240 transitions. [2022-01-28 14:59:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:59:37,634 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 [2022-01-28 14:59:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:37,636 INFO L225 Difference]: With dead ends: 1007 [2022-01-28 14:59:37,636 INFO L226 Difference]: Without dead ends: 986 [2022-01-28 14:59:37,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:59:37,636 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:37,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 261 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 734 Invalid, 0 Unknown, 142 Unchecked, 0.3s Time] [2022-01-28 14:59:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-01-28 14:59:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 730. [2022-01-28 14:59:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.2949245541838135) internal successors, (2402), 729 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2402 transitions. [2022-01-28 14:59:37,645 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2402 transitions. Word has length 21 [2022-01-28 14:59:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:37,645 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2402 transitions. [2022-01-28 14:59:37,645 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) [2022-01-28 14:59:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2402 transitions. [2022-01-28 14:59:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:37,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:37,646 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] [2022-01-28 14:59:37,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Ended with exit code 0 [2022-01-28 14:59:37,846 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 [2022-01-28 14:59:37,846 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:37,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1832105461, now seen corresponding path program 510 times [2022-01-28 14:59:37,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:37,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326254325] [2022-01-28 14:59:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:37,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:37,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326254325] [2022-01-28 14:59:37,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326254325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750200337] [2022-01-28 14:59:37,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:37,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:37,988 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) [2022-01-28 14:59:37,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Waiting until timeout for monitored process [2022-01-28 14:59:38,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:59:38,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:38,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:38,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:38,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:38,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:38,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:38,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:38,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:38,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:38,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:38,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:38,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:38,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:38,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:38,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:38,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:38,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750200337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:38,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:38,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:38,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31599722] [2022-01-28 14:59:38,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:38,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:38,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:38,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:38,470 INFO L87 Difference]: Start difference. First operand 730 states and 2402 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) [2022-01-28 14:59:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:38,964 INFO L93 Difference]: Finished difference Result 1089 states and 3455 transitions. [2022-01-28 14:59:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:59:38,964 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 [2022-01-28 14:59:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:38,966 INFO L225 Difference]: With dead ends: 1089 [2022-01-28 14:59:38,966 INFO L226 Difference]: Without dead ends: 1074 [2022-01-28 14:59:38,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:59:38,966 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 121 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:38,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 183 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 538 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-01-28 14:59:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-01-28 14:59:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 728. [2022-01-28 14:59:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 3.2902338376891334) internal successors, (2392), 727 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) [2022-01-28 14:59:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2392 transitions. [2022-01-28 14:59:38,975 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2392 transitions. Word has length 21 [2022-01-28 14:59:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:38,975 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 2392 transitions. [2022-01-28 14:59:38,975 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) [2022-01-28 14:59:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2392 transitions. [2022-01-28 14:59:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:38,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:38,976 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:38,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Ended with exit code 0 [2022-01-28 14:59:39,176 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 [2022-01-28 14:59:39,176 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:39,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2081948580, now seen corresponding path program 511 times [2022-01-28 14:59:39,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:39,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929744836] [2022-01-28 14:59:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:39,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:39,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:39,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929744836] [2022-01-28 14:59:39,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929744836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:39,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820246557] [2022-01-28 14:59:39,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:39,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:39,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:39,283 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) [2022-01-28 14:59:39,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Waiting until timeout for monitored process [2022-01-28 14:59:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:39,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:39,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:39,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:39,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:39,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:39,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:39,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:39,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:39,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:39,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:39,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:39,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:39,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:39,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820246557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:39,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:39,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:39,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002998630] [2022-01-28 14:59:39,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:39,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:39,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:39,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:39,794 INFO L87 Difference]: Start difference. First operand 728 states and 2392 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) [2022-01-28 14:59:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:40,194 INFO L93 Difference]: Finished difference Result 997 states and 3194 transitions. [2022-01-28 14:59:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:59:40,194 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 [2022-01-28 14:59:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:40,196 INFO L225 Difference]: With dead ends: 997 [2022-01-28 14:59:40,196 INFO L226 Difference]: Without dead ends: 978 [2022-01-28 14:59:40,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:59:40,196 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:40,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 262 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 679 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2022-01-28 14:59:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-28 14:59:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 730. [2022-01-28 14:59:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.2935528120713307) internal successors, (2401), 729 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2401 transitions. [2022-01-28 14:59:40,204 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2401 transitions. Word has length 21 [2022-01-28 14:59:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:40,205 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2401 transitions. [2022-01-28 14:59:40,205 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) [2022-01-28 14:59:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2401 transitions. [2022-01-28 14:59:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:40,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:40,205 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:40,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Ended with exit code 0 [2022-01-28 14:59:40,406 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 [2022-01-28 14:59:40,406 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash -692416993, now seen corresponding path program 512 times [2022-01-28 14:59:40,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:40,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556774570] [2022-01-28 14:59:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:40,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:40,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:40,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556774570] [2022-01-28 14:59:40,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556774570] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:40,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319045638] [2022-01-28 14:59:40,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:40,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:40,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:40,556 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) [2022-01-28 14:59:40,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Waiting until timeout for monitored process [2022-01-28 14:59:40,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:40,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:40,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:40,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:40,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:40,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:40,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:40,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:40,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:40,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:40,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:40,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:40,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:41,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:41,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:41,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:41,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:41,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319045638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:41,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:41,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:41,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138141727] [2022-01-28 14:59:41,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:41,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:41,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:41,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:41,070 INFO L87 Difference]: Start difference. First operand 730 states and 2401 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) [2022-01-28 14:59:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:41,409 INFO L93 Difference]: Finished difference Result 1071 states and 3385 transitions. [2022-01-28 14:59:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:59:41,409 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 [2022-01-28 14:59:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:41,411 INFO L225 Difference]: With dead ends: 1071 [2022-01-28 14:59:41,411 INFO L226 Difference]: Without dead ends: 1011 [2022-01-28 14:59:41,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:59:41,411 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:41,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 224 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 416 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-01-28 14:59:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-01-28 14:59:41,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 732. [2022-01-28 14:59:41,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 3.2913816689466486) internal successors, (2406), 731 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2406 transitions. [2022-01-28 14:59:41,420 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2406 transitions. Word has length 21 [2022-01-28 14:59:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:41,420 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 2406 transitions. [2022-01-28 14:59:41,420 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) [2022-01-28 14:59:41,420 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2406 transitions. [2022-01-28 14:59:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:41,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:41,421 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:41,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Ended with exit code 0 [2022-01-28 14:59:41,621 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 [2022-01-28 14:59:41,621 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:41,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1083885380, now seen corresponding path program 513 times [2022-01-28 14:59:41,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:41,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483100253] [2022-01-28 14:59:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:41,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:41,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:41,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483100253] [2022-01-28 14:59:41,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483100253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:41,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856979606] [2022-01-28 14:59:41,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:41,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:41,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:41,729 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) [2022-01-28 14:59:41,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Waiting until timeout for monitored process [2022-01-28 14:59:41,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:59:41,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:41,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:41,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:41,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:41,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:41,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:41,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:41,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:41,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:42,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:42,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:42,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:42,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:42,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:42,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:42,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856979606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:42,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:42,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:59:42,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260537438] [2022-01-28 14:59:42,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:42,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:42,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:42,205 INFO L87 Difference]: Start difference. First operand 732 states and 2406 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) [2022-01-28 14:59:42,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:42,389 INFO L93 Difference]: Finished difference Result 902 states and 2903 transitions. [2022-01-28 14:59:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:59:42,389 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 [2022-01-28 14:59:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:42,390 INFO L225 Difference]: With dead ends: 902 [2022-01-28 14:59:42,390 INFO L226 Difference]: Without dead ends: 879 [2022-01-28 14:59:42,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:59:42,391 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:42,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 182 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 396 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2022-01-28 14:59:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-28 14:59:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 730. [2022-01-28 14:59:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.2935528120713307) internal successors, (2401), 729 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2401 transitions. [2022-01-28 14:59:42,399 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2401 transitions. Word has length 21 [2022-01-28 14:59:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:42,399 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2401 transitions. [2022-01-28 14:59:42,399 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) [2022-01-28 14:59:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2401 transitions. [2022-01-28 14:59:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:42,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:42,400 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:42,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:42,600 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 [2022-01-28 14:59:42,600 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash 740735729, now seen corresponding path program 514 times [2022-01-28 14:59:42,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:42,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482842528] [2022-01-28 14:59:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:42,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:42,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:42,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482842528] [2022-01-28 14:59:42,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482842528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:42,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831840786] [2022-01-28 14:59:42,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:42,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:42,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:42,701 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) [2022-01-28 14:59:42,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Waiting until timeout for monitored process [2022-01-28 14:59:42,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:42,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:42,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:42,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:42,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:42,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:42,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:42,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:42,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:42,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:42,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:43,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:43,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:43,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:43,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:59:43,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:43,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:43,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831840786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:43,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:43,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:43,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798572790] [2022-01-28 14:59:43,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:43,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:43,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:43,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:43,124 INFO L87 Difference]: Start difference. First operand 730 states and 2401 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) [2022-01-28 14:59:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:43,276 INFO L93 Difference]: Finished difference Result 833 states and 2686 transitions. [2022-01-28 14:59:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:59:43,276 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 [2022-01-28 14:59:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:43,277 INFO L225 Difference]: With dead ends: 833 [2022-01-28 14:59:43,277 INFO L226 Difference]: Without dead ends: 789 [2022-01-28 14:59:43,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:43,278 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:43,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 145 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 409 Invalid, 0 Unknown, 211 Unchecked, 0.1s Time] [2022-01-28 14:59:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-28 14:59:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 730. [2022-01-28 14:59:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.2935528120713307) internal successors, (2401), 729 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2401 transitions. [2022-01-28 14:59:43,285 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2401 transitions. Word has length 21 [2022-01-28 14:59:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:43,285 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2401 transitions. [2022-01-28 14:59:43,285 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) [2022-01-28 14:59:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2401 transitions. [2022-01-28 14:59:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:43,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:43,286 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:43,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Ended with exit code 0 [2022-01-28 14:59:43,486 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 [2022-01-28 14:59:43,487 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:43,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:43,487 INFO L85 PathProgramCache]: Analyzing trace with hash -913604504, now seen corresponding path program 515 times [2022-01-28 14:59:43,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:43,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678723237] [2022-01-28 14:59:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:43,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:43,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:43,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678723237] [2022-01-28 14:59:43,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678723237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:43,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380495048] [2022-01-28 14:59:43,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:43,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:43,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:43,618 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) [2022-01-28 14:59:43,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Waiting until timeout for monitored process [2022-01-28 14:59:43,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:59:43,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:43,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:43,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:43,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:43,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:43,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:43,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:43,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:43,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:43,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:43,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:43,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:44,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:44,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:44,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:44,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:44,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380495048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:44,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:44,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:44,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278594417] [2022-01-28 14:59:44,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:44,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:44,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:44,110 INFO L87 Difference]: Start difference. First operand 730 states and 2401 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) [2022-01-28 14:59:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:44,424 INFO L93 Difference]: Finished difference Result 975 states and 3131 transitions. [2022-01-28 14:59:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:59:44,424 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 [2022-01-28 14:59:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:44,426 INFO L225 Difference]: With dead ends: 975 [2022-01-28 14:59:44,426 INFO L226 Difference]: Without dead ends: 956 [2022-01-28 14:59:44,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:59:44,426 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:44,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 228 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 467 Invalid, 0 Unknown, 149 Unchecked, 0.2s Time] [2022-01-28 14:59:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-01-28 14:59:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 733. [2022-01-28 14:59:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.296448087431694) internal successors, (2413), 732 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2413 transitions. [2022-01-28 14:59:44,434 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2413 transitions. Word has length 21 [2022-01-28 14:59:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:44,435 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2413 transitions. [2022-01-28 14:59:44,435 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) [2022-01-28 14:59:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2413 transitions. [2022-01-28 14:59:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:44,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:44,436 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:44,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:44,636 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 [2022-01-28 14:59:44,636 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash 8097636, now seen corresponding path program 516 times [2022-01-28 14:59:44,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:44,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642153548] [2022-01-28 14:59:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:44,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:44,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642153548] [2022-01-28 14:59:44,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642153548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895894381] [2022-01-28 14:59:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:44,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:44,741 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) [2022-01-28 14:59:44,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Waiting until timeout for monitored process [2022-01-28 14:59:44,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:59:44,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:44,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:44,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:44,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:44,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:44,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:44,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:44,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:44,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:45,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:45,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:45,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:45,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:45,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:45,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:45,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895894381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:45,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:45,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:45,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973881830] [2022-01-28 14:59:45,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:45,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:45,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:45,233 INFO L87 Difference]: Start difference. First operand 733 states and 2413 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) [2022-01-28 14:59:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:45,575 INFO L93 Difference]: Finished difference Result 999 states and 3193 transitions. [2022-01-28 14:59:45,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:59:45,575 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 [2022-01-28 14:59:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:45,577 INFO L225 Difference]: With dead ends: 999 [2022-01-28 14:59:45,577 INFO L226 Difference]: Without dead ends: 984 [2022-01-28 14:59:45,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:59:45,577 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:45,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 214 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 536 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-01-28 14:59:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-28 14:59:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 735. [2022-01-28 14:59:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.2983651226158037) internal successors, (2421), 734 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) [2022-01-28 14:59:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2421 transitions. [2022-01-28 14:59:45,586 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2421 transitions. Word has length 21 [2022-01-28 14:59:45,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:45,586 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2421 transitions. [2022-01-28 14:59:45,586 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) [2022-01-28 14:59:45,586 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2421 transitions. [2022-01-28 14:59:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:45,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:45,587 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:45,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Ended with exit code 0 [2022-01-28 14:59:45,787 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 [2022-01-28 14:59:45,787 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash -745285980, now seen corresponding path program 517 times [2022-01-28 14:59:45,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:45,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268803346] [2022-01-28 14:59:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:45,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:45,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:45,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268803346] [2022-01-28 14:59:45,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268803346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:45,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543423016] [2022-01-28 14:59:45,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:45,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:45,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:45,898 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) [2022-01-28 14:59:45,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Waiting until timeout for monitored process [2022-01-28 14:59:45,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:45,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:45,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:46,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:46,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:46,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:46,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:46,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:46,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:46,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:46,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:46,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:46,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:46,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:46,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:46,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:46,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543423016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:46,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:46,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:46,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201657385] [2022-01-28 14:59:46,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:46,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:46,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:46,389 INFO L87 Difference]: Start difference. First operand 735 states and 2421 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) [2022-01-28 14:59:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:46,650 INFO L93 Difference]: Finished difference Result 935 states and 3014 transitions. [2022-01-28 14:59:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:59:46,651 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 [2022-01-28 14:59:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:46,652 INFO L225 Difference]: With dead ends: 935 [2022-01-28 14:59:46,652 INFO L226 Difference]: Without dead ends: 928 [2022-01-28 14:59:46,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:46,653 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:46,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 199 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 448 Invalid, 0 Unknown, 230 Unchecked, 0.2s Time] [2022-01-28 14:59:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-28 14:59:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 733. [2022-01-28 14:59:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.296448087431694) internal successors, (2413), 732 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2413 transitions. [2022-01-28 14:59:46,661 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2413 transitions. Word has length 21 [2022-01-28 14:59:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:46,661 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2413 transitions. [2022-01-28 14:59:46,661 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) [2022-01-28 14:59:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2413 transitions. [2022-01-28 14:59:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:46,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:46,662 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:46,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Ended with exit code 0 [2022-01-28 14:59:46,862 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 [2022-01-28 14:59:46,862 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1334007848, now seen corresponding path program 518 times [2022-01-28 14:59:46,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:46,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319668501] [2022-01-28 14:59:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:46,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:46,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319668501] [2022-01-28 14:59:46,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319668501] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304195527] [2022-01-28 14:59:46,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:46,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:46,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:46,994 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) [2022-01-28 14:59:46,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Waiting until timeout for monitored process [2022-01-28 14:59:47,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:47,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:47,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:47,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:47,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:47,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:47,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:47,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:47,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:47,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:47,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:47,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:47,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:47,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:47,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:47,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:47,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:47,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304195527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:47,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:47,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:47,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385738623] [2022-01-28 14:59:47,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:47,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:47,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:47,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:47,521 INFO L87 Difference]: Start difference. First operand 733 states and 2413 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) [2022-01-28 14:59:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:47,856 INFO L93 Difference]: Finished difference Result 972 states and 3129 transitions. [2022-01-28 14:59:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:59:47,856 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 [2022-01-28 14:59:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:47,858 INFO L225 Difference]: With dead ends: 972 [2022-01-28 14:59:47,858 INFO L226 Difference]: Without dead ends: 953 [2022-01-28 14:59:47,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:59:47,858 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:47,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 179 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 418 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-01-28 14:59:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-01-28 14:59:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 733. [2022-01-28 14:59:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.296448087431694) internal successors, (2413), 732 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2413 transitions. [2022-01-28 14:59:47,867 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2413 transitions. Word has length 21 [2022-01-28 14:59:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:47,867 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2413 transitions. [2022-01-28 14:59:47,867 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) [2022-01-28 14:59:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2413 transitions. [2022-01-28 14:59:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:47,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:47,868 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] [2022-01-28 14:59:47,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Ended with exit code 0 [2022-01-28 14:59:48,068 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 [2022-01-28 14:59:48,068 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:48,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:48,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2110545571, now seen corresponding path program 519 times [2022-01-28 14:59:48,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:48,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410479512] [2022-01-28 14:59:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:48,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:48,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410479512] [2022-01-28 14:59:48,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410479512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594625226] [2022-01-28 14:59:48,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:48,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:48,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:48,163 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) [2022-01-28 14:59:48,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Waiting until timeout for monitored process [2022-01-28 14:59:48,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:59:48,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:48,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:48,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:48,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:48,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:48,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:48,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:48,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:48,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:48,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:48,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:48,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:48,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:48,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:48,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594625226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:48,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:48,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:48,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532368897] [2022-01-28 14:59:48,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:48,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:48,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:48,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:48,673 INFO L87 Difference]: Start difference. First operand 733 states and 2413 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) [2022-01-28 14:59:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:48,972 INFO L93 Difference]: Finished difference Result 983 states and 3159 transitions. [2022-01-28 14:59:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:59:48,972 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 [2022-01-28 14:59:48,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:48,974 INFO L225 Difference]: With dead ends: 983 [2022-01-28 14:59:48,974 INFO L226 Difference]: Without dead ends: 950 [2022-01-28 14:59:48,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:48,974 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:48,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 237 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 545 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-01-28 14:59:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-01-28 14:59:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 735. [2022-01-28 14:59:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.295640326975477) internal successors, (2419), 734 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2419 transitions. [2022-01-28 14:59:48,982 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2419 transitions. Word has length 21 [2022-01-28 14:59:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:48,982 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2419 transitions. [2022-01-28 14:59:48,983 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) [2022-01-28 14:59:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2419 transitions. [2022-01-28 14:59:48,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:48,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:48,983 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] [2022-01-28 14:59:48,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Ended with exit code 0 [2022-01-28 14:59:49,184 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 [2022-01-28 14:59:49,184 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:49,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:49,184 INFO L85 PathProgramCache]: Analyzing trace with hash 747356381, now seen corresponding path program 520 times [2022-01-28 14:59:49,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:49,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741473027] [2022-01-28 14:59:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:49,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:49,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:49,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741473027] [2022-01-28 14:59:49,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741473027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:49,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607599805] [2022-01-28 14:59:49,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:49,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:49,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:49,298 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) [2022-01-28 14:59:49,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Waiting until timeout for monitored process [2022-01-28 14:59:49,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:49,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:49,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:49,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:49,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:49,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:49,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:49,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:49,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:49,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:49,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:49,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:59:49,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:49,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:49,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607599805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:49,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:49,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:49,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59085782] [2022-01-28 14:59:49,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:49,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:49,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:49,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:49,741 INFO L87 Difference]: Start difference. First operand 735 states and 2419 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) [2022-01-28 14:59:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:49,890 INFO L93 Difference]: Finished difference Result 829 states and 2680 transitions. [2022-01-28 14:59:49,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:59:49,891 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 [2022-01-28 14:59:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:49,892 INFO L225 Difference]: With dead ends: 829 [2022-01-28 14:59:49,892 INFO L226 Difference]: Without dead ends: 807 [2022-01-28 14:59:49,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:49,892 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:49,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 166 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 412 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-01-28 14:59:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-28 14:59:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 735. [2022-01-28 14:59:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.295640326975477) internal successors, (2419), 734 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2419 transitions. [2022-01-28 14:59:49,900 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2419 transitions. Word has length 21 [2022-01-28 14:59:49,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:49,900 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2419 transitions. [2022-01-28 14:59:49,900 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) [2022-01-28 14:59:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2419 transitions. [2022-01-28 14:59:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:49,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:49,901 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:49,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Ended with exit code 0 [2022-01-28 14:59:50,101 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 [2022-01-28 14:59:50,101 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:50,101 INFO L85 PathProgramCache]: Analyzing trace with hash 230489955, now seen corresponding path program 521 times [2022-01-28 14:59:50,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:50,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984282377] [2022-01-28 14:59:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:50,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:50,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:50,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984282377] [2022-01-28 14:59:50,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984282377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:50,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668889765] [2022-01-28 14:59:50,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:50,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:50,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:50,200 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) [2022-01-28 14:59:50,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Waiting until timeout for monitored process [2022-01-28 14:59:50,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:50,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:50,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:50,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:50,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:50,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:50,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:50,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:50,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:50,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:50,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:50,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:50,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:50,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:50,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:50,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:50,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:50,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668889765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:50,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:50,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:50,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982447820] [2022-01-28 14:59:50,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:50,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:50,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:50,728 INFO L87 Difference]: Start difference. First operand 735 states and 2419 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) [2022-01-28 14:59:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:51,068 INFO L93 Difference]: Finished difference Result 963 states and 3107 transitions. [2022-01-28 14:59:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:59:51,069 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 [2022-01-28 14:59:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:51,070 INFO L225 Difference]: With dead ends: 963 [2022-01-28 14:59:51,070 INFO L226 Difference]: Without dead ends: 950 [2022-01-28 14:59:51,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:51,071 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:51,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 228 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 672 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-01-28 14:59:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-01-28 14:59:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 736. [2022-01-28 14:59:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.293877551020408) internal successors, (2421), 735 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) [2022-01-28 14:59:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2421 transitions. [2022-01-28 14:59:51,079 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2421 transitions. Word has length 21 [2022-01-28 14:59:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:51,079 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2421 transitions. [2022-01-28 14:59:51,079 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) [2022-01-28 14:59:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2421 transitions. [2022-01-28 14:59:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:51,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:51,080 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:51,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Ended with exit code 0 [2022-01-28 14:59:51,280 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 [2022-01-28 14:59:51,281 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:51,281 INFO L85 PathProgramCache]: Analyzing trace with hash -521964837, now seen corresponding path program 522 times [2022-01-28 14:59:51,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:51,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038023659] [2022-01-28 14:59:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:51,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:51,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:51,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038023659] [2022-01-28 14:59:51,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038023659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:51,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376789225] [2022-01-28 14:59:51,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:51,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:51,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:51,390 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) [2022-01-28 14:59:51,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Waiting until timeout for monitored process [2022-01-28 14:59:51,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:59:51,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:51,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:51,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:51,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:51,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:51,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:51,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:51,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:51,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:51,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:51,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:51,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:51,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:51,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:59:51,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:51,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:51,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376789225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:51,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:51,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:51,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630793911] [2022-01-28 14:59:51,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:51,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:51,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:51,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:51,869 INFO L87 Difference]: Start difference. First operand 736 states and 2421 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) [2022-01-28 14:59:52,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:52,017 INFO L93 Difference]: Finished difference Result 832 states and 2675 transitions. [2022-01-28 14:59:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:59:52,018 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 [2022-01-28 14:59:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:52,019 INFO L225 Difference]: With dead ends: 832 [2022-01-28 14:59:52,019 INFO L226 Difference]: Without dead ends: 822 [2022-01-28 14:59:52,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:52,019 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:52,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 164 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 407 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-01-28 14:59:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-01-28 14:59:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 736. [2022-01-28 14:59:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.293877551020408) internal successors, (2421), 735 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) [2022-01-28 14:59:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2421 transitions. [2022-01-28 14:59:52,028 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2421 transitions. Word has length 21 [2022-01-28 14:59:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:52,028 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2421 transitions. [2022-01-28 14:59:52,028 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) [2022-01-28 14:59:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2421 transitions. [2022-01-28 14:59:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:52,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:52,029 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:52,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Ended with exit code 0 [2022-01-28 14:59:52,229 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 [2022-01-28 14:59:52,229 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash 264089183, now seen corresponding path program 523 times [2022-01-28 14:59:52,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:52,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309521426] [2022-01-28 14:59:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:52,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:52,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:52,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309521426] [2022-01-28 14:59:52,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309521426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:52,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527976981] [2022-01-28 14:59:52,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:52,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:52,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:52,360 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) [2022-01-28 14:59:52,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Waiting until timeout for monitored process [2022-01-28 14:59:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:52,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:52,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:52,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:52,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:52,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:52,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:52,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:52,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:52,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:52,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:52,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:52,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:52,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:52,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:52,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:52,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527976981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:52,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:52,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:52,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195454907] [2022-01-28 14:59:52,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:52,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:52,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:52,886 INFO L87 Difference]: Start difference. First operand 736 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) [2022-01-28 14:59:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:53,518 INFO L93 Difference]: Finished difference Result 1124 states and 3523 transitions. [2022-01-28 14:59:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 14:59:53,518 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 [2022-01-28 14:59:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:53,520 INFO L225 Difference]: With dead ends: 1124 [2022-01-28 14:59:53,520 INFO L226 Difference]: Without dead ends: 1070 [2022-01-28 14:59:53,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:59:53,520 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 93 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:53,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 271 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 785 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-01-28 14:59:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-01-28 14:59:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 743. [2022-01-28 14:59:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.3059299191374665) internal successors, (2453), 742 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2453 transitions. [2022-01-28 14:59:53,530 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2453 transitions. Word has length 21 [2022-01-28 14:59:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:53,530 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2453 transitions. [2022-01-28 14:59:53,530 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) [2022-01-28 14:59:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2453 transitions. [2022-01-28 14:59:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:53,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:53,531 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:59:53,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Ended with exit code 0 [2022-01-28 14:59:53,731 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 [2022-01-28 14:59:53,732 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash -591467545, now seen corresponding path program 524 times [2022-01-28 14:59:53,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:53,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044989805] [2022-01-28 14:59:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:53,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:53,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044989805] [2022-01-28 14:59:53,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044989805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411005390] [2022-01-28 14:59:53,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:59:53,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:53,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:53,836 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) [2022-01-28 14:59:53,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Waiting until timeout for monitored process [2022-01-28 14:59:53,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:59:53,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:53,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:53,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:54,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:54,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:54,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:54,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:54,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:54,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:54,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:54,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:54,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:59:54,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:54,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:59:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:54,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411005390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:54,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:54,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 14:59:54,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905562125] [2022-01-28 14:59:54,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:54,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:54,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:54,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:54,290 INFO L87 Difference]: Start difference. First operand 743 states and 2453 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) [2022-01-28 14:59:54,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:54,481 INFO L93 Difference]: Finished difference Result 857 states and 2762 transitions. [2022-01-28 14:59:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:59:54,481 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 [2022-01-28 14:59:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:54,483 INFO L225 Difference]: With dead ends: 857 [2022-01-28 14:59:54,483 INFO L226 Difference]: Without dead ends: 799 [2022-01-28 14:59:54,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:54,483 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:54,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 154 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 515 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-01-28 14:59:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-28 14:59:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 737. [2022-01-28 14:59:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.307065217391304) internal successors, (2434), 736 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2434 transitions. [2022-01-28 14:59:54,491 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2434 transitions. Word has length 21 [2022-01-28 14:59:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:54,491 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2434 transitions. [2022-01-28 14:59:54,491 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) [2022-01-28 14:59:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2434 transitions. [2022-01-28 14:59:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:54,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:54,492 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] [2022-01-28 14:59:54,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Ended with exit code 0 [2022-01-28 14:59:54,692 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 [2022-01-28 14:59:54,693 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1311106760, now seen corresponding path program 525 times [2022-01-28 14:59:54,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:54,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542420122] [2022-01-28 14:59:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:54,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:54,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:54,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542420122] [2022-01-28 14:59:54,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542420122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:54,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075376041] [2022-01-28 14:59:54,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:59:54,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:54,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:54,808 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) [2022-01-28 14:59:54,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Waiting until timeout for monitored process [2022-01-28 14:59:54,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:59:54,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:54,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:54,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:54,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:54,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:54,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:54,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:54,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:54,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:55,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:55,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:55,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:55,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:55,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:55,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:55,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:55,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075376041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:55,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:55,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:59:55,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367769074] [2022-01-28 14:59:55,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:55,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:55,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:55,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:55,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:55,255 INFO L87 Difference]: Start difference. First operand 737 states and 2434 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) [2022-01-28 14:59:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:55,697 INFO L93 Difference]: Finished difference Result 1059 states and 3385 transitions. [2022-01-28 14:59:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:59:55,697 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 [2022-01-28 14:59:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:55,699 INFO L225 Difference]: With dead ends: 1059 [2022-01-28 14:59:55,699 INFO L226 Difference]: Without dead ends: 1036 [2022-01-28 14:59:55,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:59:55,699 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:55,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 217 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 678 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2022-01-28 14:59:55,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-01-28 14:59:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 737. [2022-01-28 14:59:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.307065217391304) internal successors, (2434), 736 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2434 transitions. [2022-01-28 14:59:55,708 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2434 transitions. Word has length 21 [2022-01-28 14:59:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:55,708 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2434 transitions. [2022-01-28 14:59:55,708 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) [2022-01-28 14:59:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2434 transitions. [2022-01-28 14:59:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:55,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:55,709 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] [2022-01-28 14:59:55,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Forceful destruction successful, exit code 0 [2022-01-28 14:59:55,909 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 [2022-01-28 14:59:55,909 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash -133007187, now seen corresponding path program 526 times [2022-01-28 14:59:55,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:55,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541038664] [2022-01-28 14:59:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:55,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:56,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:56,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541038664] [2022-01-28 14:59:56,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541038664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:56,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866301229] [2022-01-28 14:59:56,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:59:56,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:56,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:56,040 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) [2022-01-28 14:59:56,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Waiting until timeout for monitored process [2022-01-28 14:59:56,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:59:56,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:56,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:56,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:56,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:56,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:56,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:56,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:56,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:56,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:56,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:56,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:56,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:56,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:56,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866301229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:56,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:56,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 14:59:56,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269965602] [2022-01-28 14:59:56,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:56,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:59:56,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:56,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:59:56,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:59:56,518 INFO L87 Difference]: Start difference. First operand 737 states and 2434 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) [2022-01-28 14:59:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:56,874 INFO L93 Difference]: Finished difference Result 945 states and 3018 transitions. [2022-01-28 14:59:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:59:56,874 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 [2022-01-28 14:59:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:56,876 INFO L225 Difference]: With dead ends: 945 [2022-01-28 14:59:56,876 INFO L226 Difference]: Without dead ends: 924 [2022-01-28 14:59:56,876 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 [2022-01-28 14:59:56,876 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:56,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 199 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 620 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-01-28 14:59:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-28 14:59:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 733. [2022-01-28 14:59:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.296448087431694) internal successors, (2413), 732 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2413 transitions. [2022-01-28 14:59:56,884 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2413 transitions. Word has length 21 [2022-01-28 14:59:56,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:56,885 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2413 transitions. [2022-01-28 14:59:56,885 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) [2022-01-28 14:59:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2413 transitions. [2022-01-28 14:59:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:56,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:56,885 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] [2022-01-28 14:59:56,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Ended with exit code 0 [2022-01-28 14:59:57,086 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 [2022-01-28 14:59:57,086 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:57,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:57,086 INFO L85 PathProgramCache]: Analyzing trace with hash 995796058, now seen corresponding path program 527 times [2022-01-28 14:59:57,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:57,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483885806] [2022-01-28 14:59:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:57,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:57,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483885806] [2022-01-28 14:59:57,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483885806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970847852] [2022-01-28 14:59:57,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:59:57,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:57,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:57,195 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) [2022-01-28 14:59:57,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Waiting until timeout for monitored process [2022-01-28 14:59:57,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:59:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:57,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:57,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:57,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:57,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:57,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:57,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:57,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:57,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:57,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:57,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:57,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:57,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:57,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:57,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:57,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970847852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:57,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:57,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:57,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604698913] [2022-01-28 14:59:57,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:57,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:57,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:57,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:57,655 INFO L87 Difference]: Start difference. First operand 733 states and 2413 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) [2022-01-28 14:59:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:57,915 INFO L93 Difference]: Finished difference Result 943 states and 3042 transitions. [2022-01-28 14:59:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:59:57,915 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 [2022-01-28 14:59:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:57,916 INFO L225 Difference]: With dead ends: 943 [2022-01-28 14:59:57,916 INFO L226 Difference]: Without dead ends: 924 [2022-01-28 14:59:57,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:59:57,916 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:57,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 186 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 349 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2022-01-28 14:59:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-28 14:59:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 735. [2022-01-28 14:59:57,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.2997275204359675) internal successors, (2422), 734 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) [2022-01-28 14:59:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2422 transitions. [2022-01-28 14:59:57,925 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2422 transitions. Word has length 21 [2022-01-28 14:59:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:57,925 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2422 transitions. [2022-01-28 14:59:57,925 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) [2022-01-28 14:59:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2422 transitions. [2022-01-28 14:59:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:57,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:57,926 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] [2022-01-28 14:59:57,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Ended with exit code 0 [2022-01-28 14:59:58,126 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 [2022-01-28 14:59:58,126 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:58,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1051558886, now seen corresponding path program 528 times [2022-01-28 14:59:58,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:58,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557637846] [2022-01-28 14:59:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:58,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:58,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557637846] [2022-01-28 14:59:58,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557637846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930298978] [2022-01-28 14:59:58,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:59:58,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:58,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:58,231 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) [2022-01-28 14:59:58,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Waiting until timeout for monitored process [2022-01-28 14:59:58,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:59:58,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:59:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:58,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:58,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:58,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:58,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:58,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:58,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:58,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:58,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:58,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:58,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:58,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:58,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:58,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:58,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:58,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930298978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:58,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:58,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 14:59:58,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177641136] [2022-01-28 14:59:58,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:58,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:59:58,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:59:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:59:58,688 INFO L87 Difference]: Start difference. First operand 735 states and 2422 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) [2022-01-28 14:59:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:59:58,975 INFO L93 Difference]: Finished difference Result 941 states and 3041 transitions. [2022-01-28 14:59:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:59:58,975 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 [2022-01-28 14:59:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:59:58,976 INFO L225 Difference]: With dead ends: 941 [2022-01-28 14:59:58,976 INFO L226 Difference]: Without dead ends: 922 [2022-01-28 14:59:58,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:59:58,977 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:59:58,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 229 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 511 Invalid, 0 Unknown, 222 Unchecked, 0.2s Time] [2022-01-28 14:59:58,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-28 14:59:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 737. [2022-01-28 14:59:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2948369565217392) internal successors, (2425), 736 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:59:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2425 transitions. [2022-01-28 14:59:58,991 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2425 transitions. Word has length 21 [2022-01-28 14:59:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:59:58,991 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2425 transitions. [2022-01-28 14:59:58,991 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) [2022-01-28 14:59:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2425 transitions. [2022-01-28 14:59:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:59:58,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:59:58,992 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] [2022-01-28 14:59:59,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Ended with exit code 0 [2022-01-28 14:59:59,193 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 [2022-01-28 14:59:59,193 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:59:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:59:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1002416710, now seen corresponding path program 529 times [2022-01-28 14:59:59,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:59:59,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616771875] [2022-01-28 14:59:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:59:59,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:59:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:59,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:59:59,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616771875] [2022-01-28 14:59:59,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616771875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:59:59,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029809358] [2022-01-28 14:59:59,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:59:59,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:59:59,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:59:59,313 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) [2022-01-28 14:59:59,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Waiting until timeout for monitored process [2022-01-28 14:59:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:59:59,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:59:59,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:59:59,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:59,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:59,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:59,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 14:59:59,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:59:59,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:59,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:59:59,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:59,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 14:59:59,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:59,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:59:59,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:59:59,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:59:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:59:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029809358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:59:59,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:59:59,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 14:59:59,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510048458] [2022-01-28 14:59:59,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:59:59,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:59:59,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:59:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:59:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:59:59,765 INFO L87 Difference]: Start difference. First operand 737 states and 2425 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) [2022-01-28 15:00:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:00,023 INFO L93 Difference]: Finished difference Result 948 states and 3040 transitions. [2022-01-28 15:00:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:00,023 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 [2022-01-28 15:00:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:00,025 INFO L225 Difference]: With dead ends: 948 [2022-01-28 15:00:00,025 INFO L226 Difference]: Without dead ends: 933 [2022-01-28 15:00:00,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:00,025 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:00,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 127 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 349 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-01-28 15:00:00,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-01-28 15:00:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 739. [2022-01-28 15:00:00,032 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) [2022-01-28 15:00:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2433 transitions. [2022-01-28 15:00:00,034 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2433 transitions. Word has length 21 [2022-01-28 15:00:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:00,034 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2433 transitions. [2022-01-28 15:00:00,034 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) [2022-01-28 15:00:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2433 transitions. [2022-01-28 15:00:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:00,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:00,035 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:00,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Ended with exit code 0 [2022-01-28 15:00:00,235 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 [2022-01-28 15:00:00,235 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash 249033094, now seen corresponding path program 530 times [2022-01-28 15:00:00,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:00,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199991602] [2022-01-28 15:00:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:00,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:00,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:00,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199991602] [2022-01-28 15:00:00,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199991602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:00,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307435964] [2022-01-28 15:00:00,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:00,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:00,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:00,339 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) [2022-01-28 15:00:00,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Waiting until timeout for monitored process [2022-01-28 15:00:00,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:00,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:00,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:00,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:00,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:00,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:00,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:00,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:00,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:00,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:00,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:00,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:00,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:00,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:00,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:00,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307435964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:00,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:00,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:00,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190274739] [2022-01-28 15:00:00,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:00,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:00,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:00,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:00,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:00,811 INFO L87 Difference]: Start difference. First operand 739 states and 2433 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) [2022-01-28 15:00:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:01,086 INFO L93 Difference]: Finished difference Result 968 states and 3100 transitions. [2022-01-28 15:00:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:01,086 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 [2022-01-28 15:00:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:01,088 INFO L225 Difference]: With dead ends: 968 [2022-01-28 15:00:01,088 INFO L226 Difference]: Without dead ends: 949 [2022-01-28 15:00:01,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:01,088 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:01,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 179 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 431 Invalid, 0 Unknown, 220 Unchecked, 0.2s Time] [2022-01-28 15:00:01,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-28 15:00:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 737. [2022-01-28 15:00:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2948369565217392) internal successors, (2425), 736 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2425 transitions. [2022-01-28 15:00:01,097 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2425 transitions. Word has length 21 [2022-01-28 15:00:01,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:01,097 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2425 transitions. [2022-01-28 15:00:01,097 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) [2022-01-28 15:00:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2425 transitions. [2022-01-28 15:00:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:01,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:01,098 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:01,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Ended with exit code 0 [2022-01-28 15:00:01,298 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 [2022-01-28 15:00:01,298 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash -336407216, now seen corresponding path program 531 times [2022-01-28 15:00:01,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:01,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397259111] [2022-01-28 15:00:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:01,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:01,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:01,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397259111] [2022-01-28 15:00:01,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397259111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:01,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740005588] [2022-01-28 15:00:01,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:01,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:01,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:01,420 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) [2022-01-28 15:00:01,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Waiting until timeout for monitored process [2022-01-28 15:00:01,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:00:01,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:01,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:01,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:01,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:01,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:01,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:01,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:01,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:01,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:01,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:01,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:01,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:01,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:01,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:01,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:01,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740005588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:01,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:01,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:01,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749014397] [2022-01-28 15:00:01,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:01,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:01,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:01,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:01,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:01,931 INFO L87 Difference]: Start difference. First operand 737 states and 2425 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) [2022-01-28 15:00:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:02,230 INFO L93 Difference]: Finished difference Result 877 states and 2842 transitions. [2022-01-28 15:00:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:00:02,231 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 [2022-01-28 15:00:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:02,232 INFO L225 Difference]: With dead ends: 877 [2022-01-28 15:00:02,232 INFO L226 Difference]: Without dead ends: 858 [2022-01-28 15:00:02,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:02,232 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:02,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 221 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 586 Invalid, 0 Unknown, 233 Unchecked, 0.2s Time] [2022-01-28 15:00:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-01-28 15:00:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 741. [2022-01-28 15:00:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.2986486486486486) internal successors, (2441), 740 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) [2022-01-28 15:00:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2441 transitions. [2022-01-28 15:00:02,241 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2441 transitions. Word has length 21 [2022-01-28 15:00:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:02,241 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2441 transitions. [2022-01-28 15:00:02,241 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) [2022-01-28 15:00:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2441 transitions. [2022-01-28 15:00:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:02,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:02,242 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] [2022-01-28 15:00:02,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Ended with exit code 0 [2022-01-28 15:00:02,442 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 [2022-01-28 15:00:02,442 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:02,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:02,443 INFO L85 PathProgramCache]: Analyzing trace with hash 250508386, now seen corresponding path program 532 times [2022-01-28 15:00:02,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:02,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395080734] [2022-01-28 15:00:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:02,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:02,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:02,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395080734] [2022-01-28 15:00:02,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395080734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:02,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54628928] [2022-01-28 15:00:02,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:02,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:02,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:02,566 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) [2022-01-28 15:00:02,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Waiting until timeout for monitored process [2022-01-28 15:00:02,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:02,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:02,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:02,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:02,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:02,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:02,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:02,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:02,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:02,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:02,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:02,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:03,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:03,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:03,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:03,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:03,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54628928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:03,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:03,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:03,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822609565] [2022-01-28 15:00:03,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:03,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:03,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:03,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:03,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:03,094 INFO L87 Difference]: Start difference. First operand 741 states and 2441 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) [2022-01-28 15:00:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:03,373 INFO L93 Difference]: Finished difference Result 928 states and 2963 transitions. [2022-01-28 15:00:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:03,373 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 [2022-01-28 15:00:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:03,375 INFO L225 Difference]: With dead ends: 928 [2022-01-28 15:00:03,375 INFO L226 Difference]: Without dead ends: 909 [2022-01-28 15:00:03,375 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 [2022-01-28 15:00:03,375 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:03,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 212 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 488 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-01-28 15:00:03,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-28 15:00:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 745. [2022-01-28 15:00:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.297043010752688) internal successors, (2453), 744 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2453 transitions. [2022-01-28 15:00:03,384 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2453 transitions. Word has length 21 [2022-01-28 15:00:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:03,384 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2453 transitions. [2022-01-28 15:00:03,384 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) [2022-01-28 15:00:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2453 transitions. [2022-01-28 15:00:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:03,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:03,385 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:03,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Ended with exit code 0 [2022-01-28 15:00:03,585 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 [2022-01-28 15:00:03,586 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:03,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1688977848, now seen corresponding path program 533 times [2022-01-28 15:00:03,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:03,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262726561] [2022-01-28 15:00:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:03,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:03,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:03,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262726561] [2022-01-28 15:00:03,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262726561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:03,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372815973] [2022-01-28 15:00:03,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:03,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:03,707 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) [2022-01-28 15:00:03,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Waiting until timeout for monitored process [2022-01-28 15:00:03,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:00:03,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:03,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:03,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:03,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:03,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:03,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:03,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:04,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:04,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:04,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:04,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:04,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:04,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:04,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372815973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:04,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:04,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:04,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752075447] [2022-01-28 15:00:04,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:04,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:04,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:04,204 INFO L87 Difference]: Start difference. First operand 745 states and 2453 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) [2022-01-28 15:00:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:04,437 INFO L93 Difference]: Finished difference Result 873 states and 2821 transitions. [2022-01-28 15:00:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:00:04,437 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 [2022-01-28 15:00:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:04,439 INFO L225 Difference]: With dead ends: 873 [2022-01-28 15:00:04,439 INFO L226 Difference]: Without dead ends: 866 [2022-01-28 15:00:04,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:04,439 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:04,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 139 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 386 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-01-28 15:00:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-01-28 15:00:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 746. [2022-01-28 15:00:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.2966442953020136) internal successors, (2456), 745 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2456 transitions. [2022-01-28 15:00:04,448 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2456 transitions. Word has length 21 [2022-01-28 15:00:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:04,448 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2456 transitions. [2022-01-28 15:00:04,448 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) [2022-01-28 15:00:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2456 transitions. [2022-01-28 15:00:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:04,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:04,449 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:04,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:04,649 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 [2022-01-28 15:00:04,649 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:04,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2019073846, now seen corresponding path program 534 times [2022-01-28 15:00:04,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:04,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237858997] [2022-01-28 15:00:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:04,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:04,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237858997] [2022-01-28 15:00:04,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237858997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280951281] [2022-01-28 15:00:04,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:04,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:04,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:04,778 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) [2022-01-28 15:00:04,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Waiting until timeout for monitored process [2022-01-28 15:00:04,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:00:04,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:04,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:04,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:04,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:05,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:05,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:05,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:05,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:05,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:05,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:05,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:05,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:05,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:05,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:05,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:05,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280951281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:05,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:05,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:05,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604901758] [2022-01-28 15:00:05,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:05,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:05,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:05,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:05,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:05,330 INFO L87 Difference]: Start difference. First operand 746 states and 2456 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) [2022-01-28 15:00:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:05,596 INFO L93 Difference]: Finished difference Result 994 states and 3149 transitions. [2022-01-28 15:00:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:05,596 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 [2022-01-28 15:00:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:05,598 INFO L225 Difference]: With dead ends: 994 [2022-01-28 15:00:05,598 INFO L226 Difference]: Without dead ends: 956 [2022-01-28 15:00:05,598 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 [2022-01-28 15:00:05,598 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:05,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 183 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 464 Invalid, 0 Unknown, 204 Unchecked, 0.2s Time] [2022-01-28 15:00:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-01-28 15:00:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 733. [2022-01-28 15:00:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.296448087431694) internal successors, (2413), 732 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2413 transitions. [2022-01-28 15:00:05,607 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2413 transitions. Word has length 21 [2022-01-28 15:00:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:05,607 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2413 transitions. [2022-01-28 15:00:05,607 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) [2022-01-28 15:00:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2413 transitions. [2022-01-28 15:00:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:05,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:05,608 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:05,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:05,808 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 [2022-01-28 15:00:05,809 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:05,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:05,809 INFO L85 PathProgramCache]: Analyzing trace with hash -487176781, now seen corresponding path program 535 times [2022-01-28 15:00:05,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:05,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293677175] [2022-01-28 15:00:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:05,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:05,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:05,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293677175] [2022-01-28 15:00:05,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293677175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:05,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148760561] [2022-01-28 15:00:05,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:05,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:05,904 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) [2022-01-28 15:00:05,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Waiting until timeout for monitored process [2022-01-28 15:00:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:05,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:05,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:06,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:06,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:06,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:06,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:06,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:06,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:06,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:06,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:06,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:06,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:06,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:06,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:06,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:06,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148760561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:06,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:06,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:06,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165891338] [2022-01-28 15:00:06,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:06,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:06,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:06,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:06,420 INFO L87 Difference]: Start difference. First operand 733 states and 2413 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) [2022-01-28 15:00:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:06,613 INFO L93 Difference]: Finished difference Result 913 states and 2935 transitions. [2022-01-28 15:00:06,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:00:06,613 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 [2022-01-28 15:00:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:06,615 INFO L225 Difference]: With dead ends: 913 [2022-01-28 15:00:06,615 INFO L226 Difference]: Without dead ends: 880 [2022-01-28 15:00:06,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:06,615 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:06,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 238 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 413 Invalid, 0 Unknown, 162 Unchecked, 0.2s Time] [2022-01-28 15:00:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-01-28 15:00:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 739. [2022-01-28 15:00:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.2913279132791327) internal successors, (2429), 738 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) [2022-01-28 15:00:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2429 transitions. [2022-01-28 15:00:06,623 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2429 transitions. Word has length 21 [2022-01-28 15:00:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2429 transitions. [2022-01-28 15:00:06,623 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) [2022-01-28 15:00:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2429 transitions. [2022-01-28 15:00:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:06,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:06,624 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:06,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Ended with exit code 0 [2022-01-28 15:00:06,825 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 [2022-01-28 15:00:06,825 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:06,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1850365971, now seen corresponding path program 536 times [2022-01-28 15:00:06,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:06,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59393172] [2022-01-28 15:00:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:06,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:06,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:06,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59393172] [2022-01-28 15:00:06,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59393172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:06,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252077550] [2022-01-28 15:00:06,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:06,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:06,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:06,925 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) [2022-01-28 15:00:06,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Waiting until timeout for monitored process [2022-01-28 15:00:06,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:06,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:06,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:06,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:07,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:07,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:07,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:07,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:07,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:07,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:07,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:07,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:07,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:07,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:07,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:07,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252077550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:07,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:07,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:07,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978835348] [2022-01-28 15:00:07,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:07,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:07,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:07,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:07,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:07,353 INFO L87 Difference]: Start difference. First operand 739 states and 2429 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) [2022-01-28 15:00:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:07,522 INFO L93 Difference]: Finished difference Result 823 states and 2659 transitions. [2022-01-28 15:00:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:00:07,522 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 [2022-01-28 15:00:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:07,523 INFO L225 Difference]: With dead ends: 823 [2022-01-28 15:00:07,523 INFO L226 Difference]: Without dead ends: 801 [2022-01-28 15:00:07,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:07,524 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:07,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 183 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 436 Invalid, 0 Unknown, 225 Unchecked, 0.2s Time] [2022-01-28 15:00:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-28 15:00:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 740. [2022-01-28 15:00:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.290933694181326) internal successors, (2432), 739 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2432 transitions. [2022-01-28 15:00:07,532 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2432 transitions. Word has length 21 [2022-01-28 15:00:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:07,532 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2432 transitions. [2022-01-28 15:00:07,532 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) [2022-01-28 15:00:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2432 transitions. [2022-01-28 15:00:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:07,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:07,533 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:07,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:07,733 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 [2022-01-28 15:00:07,733 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:07,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1927734899, now seen corresponding path program 537 times [2022-01-28 15:00:07,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:07,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276683575] [2022-01-28 15:00:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:07,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:07,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276683575] [2022-01-28 15:00:07,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276683575] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745668697] [2022-01-28 15:00:07,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:07,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:07,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:07,828 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) [2022-01-28 15:00:07,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Waiting until timeout for monitored process [2022-01-28 15:00:07,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:00:07,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:07,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:07,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:07,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:07,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:08,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:08,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:08,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:08,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:08,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:08,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:08,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:08,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:08,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:08,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:08,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745668697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:08,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:08,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:08,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311736607] [2022-01-28 15:00:08,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:08,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:08,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:08,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:08,338 INFO L87 Difference]: Start difference. First operand 740 states and 2432 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) [2022-01-28 15:00:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:08,589 INFO L93 Difference]: Finished difference Result 950 states and 3056 transitions. [2022-01-28 15:00:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:00:08,589 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 [2022-01-28 15:00:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:08,591 INFO L225 Difference]: With dead ends: 950 [2022-01-28 15:00:08,591 INFO L226 Difference]: Without dead ends: 937 [2022-01-28 15:00:08,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:08,591 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:08,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 174 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 383 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-01-28 15:00:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-01-28 15:00:08,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 739. [2022-01-28 15:00:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.2913279132791327) internal successors, (2429), 738 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) [2022-01-28 15:00:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2429 transitions. [2022-01-28 15:00:08,600 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2429 transitions. Word has length 21 [2022-01-28 15:00:08,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:08,600 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2429 transitions. [2022-01-28 15:00:08,600 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) [2022-01-28 15:00:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2429 transitions. [2022-01-28 15:00:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:08,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:08,601 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:08,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:08,801 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 [2022-01-28 15:00:08,801 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:08,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1961334127, now seen corresponding path program 538 times [2022-01-28 15:00:08,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:08,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903234008] [2022-01-28 15:00:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:08,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:08,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:08,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903234008] [2022-01-28 15:00:08,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903234008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:08,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541142828] [2022-01-28 15:00:08,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:08,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:08,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:08,909 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) [2022-01-28 15:00:08,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Waiting until timeout for monitored process [2022-01-28 15:00:08,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:08,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:09,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:09,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:09,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:09,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:09,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:09,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:09,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:09,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:09,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:09,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:09,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:09,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:09,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:09,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541142828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:09,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:09,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:09,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681870265] [2022-01-28 15:00:09,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:09,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:09,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:09,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:09,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:09,419 INFO L87 Difference]: Start difference. First operand 739 states and 2429 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) [2022-01-28 15:00:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:09,790 INFO L93 Difference]: Finished difference Result 948 states and 3040 transitions. [2022-01-28 15:00:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:09,790 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 [2022-01-28 15:00:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:09,792 INFO L225 Difference]: With dead ends: 948 [2022-01-28 15:00:09,792 INFO L226 Difference]: Without dead ends: 921 [2022-01-28 15:00:09,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:09,792 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:09,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 223 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 711 Invalid, 0 Unknown, 92 Unchecked, 0.3s Time] [2022-01-28 15:00:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-01-28 15:00:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 739. [2022-01-28 15:00:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.2913279132791327) internal successors, (2429), 738 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) [2022-01-28 15:00:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2429 transitions. [2022-01-28 15:00:09,801 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2429 transitions. Word has length 21 [2022-01-28 15:00:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:09,801 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2429 transitions. [2022-01-28 15:00:09,801 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) [2022-01-28 15:00:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2429 transitions. [2022-01-28 15:00:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:09,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:09,802 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] [2022-01-28 15:00:09,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Ended with exit code 0 [2022-01-28 15:00:10,002 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 [2022-01-28 15:00:10,002 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:10,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:10,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1105777399, now seen corresponding path program 539 times [2022-01-28 15:00:10,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:10,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338171972] [2022-01-28 15:00:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:10,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:10,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:10,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338171972] [2022-01-28 15:00:10,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338171972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:10,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286486365] [2022-01-28 15:00:10,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:10,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:10,107 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) [2022-01-28 15:00:10,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Waiting until timeout for monitored process [2022-01-28 15:00:10,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:10,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:10,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:10,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:10,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:10,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:10,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:10,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:10,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:10,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:10,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:10,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:10,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:10,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:10,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:10,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:10,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:10,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286486365] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:10,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:10,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:10,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085973189] [2022-01-28 15:00:10,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:10,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:10,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:10,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:10,541 INFO L87 Difference]: Start difference. First operand 739 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) [2022-01-28 15:00:10,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:10,715 INFO L93 Difference]: Finished difference Result 826 states and 2667 transitions. [2022-01-28 15:00:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:00:10,715 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 [2022-01-28 15:00:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:10,716 INFO L225 Difference]: With dead ends: 826 [2022-01-28 15:00:10,717 INFO L226 Difference]: Without dead ends: 797 [2022-01-28 15:00:10,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:10,717 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:10,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 190 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 466 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2022-01-28 15:00:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-28 15:00:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 736. [2022-01-28 15:00:10,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.293877551020408) internal successors, (2421), 735 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) [2022-01-28 15:00:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2421 transitions. [2022-01-28 15:00:10,725 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2421 transitions. Word has length 21 [2022-01-28 15:00:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:10,725 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2421 transitions. [2022-01-28 15:00:10,725 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) [2022-01-28 15:00:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2421 transitions. [2022-01-28 15:00:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:10,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:10,726 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] [2022-01-28 15:00:10,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Ended with exit code 0 [2022-01-28 15:00:10,926 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 [2022-01-28 15:00:10,926 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash 958954473, now seen corresponding path program 540 times [2022-01-28 15:00:10,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:10,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214278278] [2022-01-28 15:00:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:10,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:11,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214278278] [2022-01-28 15:00:11,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214278278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484639032] [2022-01-28 15:00:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:11,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:11,068 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) [2022-01-28 15:00:11,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Waiting until timeout for monitored process [2022-01-28 15:00:11,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:00:11,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:11,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:11,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:11,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:11,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:11,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:11,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:11,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:11,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:11,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:11,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:11,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:11,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:11,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:11,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484639032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:11,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:11,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:11,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653571800] [2022-01-28 15:00:11,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:11,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:11,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:11,608 INFO L87 Difference]: Start difference. First operand 736 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) [2022-01-28 15:00:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:11,942 INFO L93 Difference]: Finished difference Result 1029 states and 3250 transitions. [2022-01-28 15:00:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:00:11,942 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 [2022-01-28 15:00:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:11,943 INFO L225 Difference]: With dead ends: 1029 [2022-01-28 15:00:11,943 INFO L226 Difference]: Without dead ends: 975 [2022-01-28 15:00:11,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:00:11,944 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:11,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 198 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 568 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-01-28 15:00:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-28 15:00:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 747. [2022-01-28 15:00:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.309651474530831) internal successors, (2469), 746 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) [2022-01-28 15:00:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2469 transitions. [2022-01-28 15:00:11,952 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2469 transitions. Word has length 21 [2022-01-28 15:00:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:11,952 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2469 transitions. [2022-01-28 15:00:11,953 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) [2022-01-28 15:00:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2469 transitions. [2022-01-28 15:00:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:11,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:11,953 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] [2022-01-28 15:00:11,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Ended with exit code 0 [2022-01-28 15:00:12,154 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 [2022-01-28 15:00:12,154 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:12,154 INFO L85 PathProgramCache]: Analyzing trace with hash 103397745, now seen corresponding path program 541 times [2022-01-28 15:00:12,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:12,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404231673] [2022-01-28 15:00:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:12,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:12,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:12,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404231673] [2022-01-28 15:00:12,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404231673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:12,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530840333] [2022-01-28 15:00:12,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:12,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:12,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:12,284 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) [2022-01-28 15:00:12,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Waiting until timeout for monitored process [2022-01-28 15:00:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:12,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:12,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:12,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:12,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:12,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:12,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:12,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:12,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:12,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:12,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:12,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:12,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:12,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:12,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530840333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:12,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:12,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:12,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937835743] [2022-01-28 15:00:12,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:12,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:12,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:12,719 INFO L87 Difference]: Start difference. First operand 747 states and 2469 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) [2022-01-28 15:00:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:12,958 INFO L93 Difference]: Finished difference Result 861 states and 2778 transitions. [2022-01-28 15:00:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:00:12,959 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 [2022-01-28 15:00:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:12,960 INFO L225 Difference]: With dead ends: 861 [2022-01-28 15:00:12,960 INFO L226 Difference]: Without dead ends: 803 [2022-01-28 15:00:12,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:12,960 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:12,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 210 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-01-28 15:00:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-28 15:00:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 744. [2022-01-28 15:00:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.3082099596231496) internal successors, (2458), 743 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) [2022-01-28 15:00:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2458 transitions. [2022-01-28 15:00:12,975 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2458 transitions. Word has length 21 [2022-01-28 15:00:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:12,975 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2458 transitions. [2022-01-28 15:00:12,975 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) [2022-01-28 15:00:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2458 transitions. [2022-01-28 15:00:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:12,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:12,976 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:12,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Ended with exit code 0 [2022-01-28 15:00:13,176 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 [2022-01-28 15:00:13,176 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1225543149, now seen corresponding path program 542 times [2022-01-28 15:00:13,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:13,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603971623] [2022-01-28 15:00:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:13,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:13,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:13,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603971623] [2022-01-28 15:00:13,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603971623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:13,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164526164] [2022-01-28 15:00:13,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:13,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:13,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:13,279 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) [2022-01-28 15:00:13,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Waiting until timeout for monitored process [2022-01-28 15:00:13,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:13,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:13,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:13,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:13,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:13,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:13,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:13,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:13,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:13,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:13,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:13,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:13,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:13,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:13,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164526164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:13,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:13,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:13,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052914409] [2022-01-28 15:00:13,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:13,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:13,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:13,729 INFO L87 Difference]: Start difference. First operand 744 states and 2458 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) [2022-01-28 15:00:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:13,914 INFO L93 Difference]: Finished difference Result 882 states and 2806 transitions. [2022-01-28 15:00:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:00:13,914 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 [2022-01-28 15:00:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:13,915 INFO L225 Difference]: With dead ends: 882 [2022-01-28 15:00:13,915 INFO L226 Difference]: Without dead ends: 817 [2022-01-28 15:00:13,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:13,915 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:13,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 201 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 498 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2022-01-28 15:00:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-28 15:00:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 746. [2022-01-28 15:00:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.3046979865771813) internal successors, (2462), 745 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) [2022-01-28 15:00:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2462 transitions. [2022-01-28 15:00:13,923 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2462 transitions. Word has length 21 [2022-01-28 15:00:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:13,923 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2462 transitions. [2022-01-28 15:00:13,923 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) [2022-01-28 15:00:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2462 transitions. [2022-01-28 15:00:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:13,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:13,924 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] [2022-01-28 15:00:13,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Ended with exit code 0 [2022-01-28 15:00:14,125 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 [2022-01-28 15:00:14,125 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:14,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:14,125 INFO L85 PathProgramCache]: Analyzing trace with hash 889451765, now seen corresponding path program 543 times [2022-01-28 15:00:14,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:14,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92448758] [2022-01-28 15:00:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:14,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:14,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92448758] [2022-01-28 15:00:14,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92448758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324636303] [2022-01-28 15:00:14,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:14,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:14,237 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) [2022-01-28 15:00:14,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Waiting until timeout for monitored process [2022-01-28 15:00:14,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:00:14,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:14,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:14,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:14,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:14,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:14,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:14,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:14,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:14,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:14,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:14,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:14,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:14,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:14,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:14,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:14,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324636303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:14,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:14,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:14,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854171969] [2022-01-28 15:00:14,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:14,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:14,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:14,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:14,810 INFO L87 Difference]: Start difference. First operand 746 states and 2462 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) [2022-01-28 15:00:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:15,058 INFO L93 Difference]: Finished difference Result 988 states and 3154 transitions. [2022-01-28 15:00:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:15,058 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 [2022-01-28 15:00:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:15,059 INFO L225 Difference]: With dead ends: 988 [2022-01-28 15:00:15,059 INFO L226 Difference]: Without dead ends: 946 [2022-01-28 15:00:15,060 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 [2022-01-28 15:00:15,060 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:15,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 199 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 511 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2022-01-28 15:00:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-01-28 15:00:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 743. [2022-01-28 15:00:15,067 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) [2022-01-28 15:00:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2458 transitions. [2022-01-28 15:00:15,068 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2458 transitions. Word has length 21 [2022-01-28 15:00:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:15,068 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2458 transitions. [2022-01-28 15:00:15,068 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) [2022-01-28 15:00:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2458 transitions. [2022-01-28 15:00:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:15,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:15,069 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] [2022-01-28 15:00:15,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:15,270 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 [2022-01-28 15:00:15,270 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:15,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2135238064, now seen corresponding path program 544 times [2022-01-28 15:00:15,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:15,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464737492] [2022-01-28 15:00:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:15,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:15,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:15,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464737492] [2022-01-28 15:00:15,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464737492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:15,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21300551] [2022-01-28 15:00:15,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:15,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:15,389 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) [2022-01-28 15:00:15,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Waiting until timeout for monitored process [2022-01-28 15:00:15,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:15,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:15,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:15,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:15,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:15,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:15,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:15,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:15,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:15,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:15,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:15,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:15,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:15,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:15,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:15,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:15,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21300551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:15,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:15,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:15,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875596110] [2022-01-28 15:00:15,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:15,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:15,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:15,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:15,927 INFO L87 Difference]: Start difference. First operand 743 states and 2458 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) [2022-01-28 15:00:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:16,237 INFO L93 Difference]: Finished difference Result 932 states and 3014 transitions. [2022-01-28 15:00:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:00:16,237 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 [2022-01-28 15:00:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:16,238 INFO L225 Difference]: With dead ends: 932 [2022-01-28 15:00:16,239 INFO L226 Difference]: Without dead ends: 909 [2022-01-28 15:00:16,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:16,239 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:16,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 170 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 536 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-01-28 15:00:16,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-01-28 15:00:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 743. [2022-01-28 15:00:16,246 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) [2022-01-28 15:00:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2458 transitions. [2022-01-28 15:00:16,248 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2458 transitions. Word has length 21 [2022-01-28 15:00:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:16,248 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2458 transitions. [2022-01-28 15:00:16,248 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) [2022-01-28 15:00:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2458 transitions. [2022-01-28 15:00:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:16,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:16,249 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:16,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Ended with exit code 0 [2022-01-28 15:00:16,449 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 [2022-01-28 15:00:16,449 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash 715615285, now seen corresponding path program 545 times [2022-01-28 15:00:16,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:16,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491760682] [2022-01-28 15:00:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:16,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:16,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:16,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491760682] [2022-01-28 15:00:16,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491760682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:16,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127992233] [2022-01-28 15:00:16,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:16,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:16,582 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) [2022-01-28 15:00:16,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Waiting until timeout for monitored process [2022-01-28 15:00:16,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:16,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:16,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:16,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:16,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:16,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:16,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:16,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:17,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:17,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:17,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:17,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:17,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:17,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:17,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127992233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:17,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:17,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:17,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633433333] [2022-01-28 15:00:17,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:17,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:17,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:17,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:17,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:17,115 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) [2022-01-28 15:00:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:17,361 INFO L93 Difference]: Finished difference Result 945 states and 3024 transitions. [2022-01-28 15:00:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:00:17,362 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 [2022-01-28 15:00:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:17,363 INFO L225 Difference]: With dead ends: 945 [2022-01-28 15:00:17,363 INFO L226 Difference]: Without dead ends: 924 [2022-01-28 15:00:17,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:17,363 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:17,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 167 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 396 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-01-28 15:00:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-28 15:00:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 739. [2022-01-28 15:00:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.3021680216802167) internal successors, (2437), 738 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) [2022-01-28 15:00:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2437 transitions. [2022-01-28 15:00:17,372 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2437 transitions. Word has length 21 [2022-01-28 15:00:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:17,372 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2437 transitions. [2022-01-28 15:00:17,372 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) [2022-01-28 15:00:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2437 transitions. [2022-01-28 15:00:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:17,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:17,373 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:17,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Ended with exit code 0 [2022-01-28 15:00:17,573 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 [2022-01-28 15:00:17,574 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2031727910, now seen corresponding path program 546 times [2022-01-28 15:00:17,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:17,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925681536] [2022-01-28 15:00:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:17,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:17,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925681536] [2022-01-28 15:00:17,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925681536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67375008] [2022-01-28 15:00:17,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:17,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:17,698 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) [2022-01-28 15:00:17,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Waiting until timeout for monitored process [2022-01-28 15:00:17,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:00:17,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:17,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:17,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:17,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:17,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:17,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:17,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:17,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:17,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:18,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:18,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:18,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:18,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:18,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:18,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:18,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:18,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67375008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:18,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:18,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:18,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904350392] [2022-01-28 15:00:18,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:18,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:18,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:18,244 INFO L87 Difference]: Start difference. First operand 739 states and 2437 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) [2022-01-28 15:00:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:18,447 INFO L93 Difference]: Finished difference Result 880 states and 2861 transitions. [2022-01-28 15:00:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:00:18,448 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 [2022-01-28 15:00:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:18,449 INFO L225 Difference]: With dead ends: 880 [2022-01-28 15:00:18,449 INFO L226 Difference]: Without dead ends: 861 [2022-01-28 15:00:18,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:18,449 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:18,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 146 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 380 Invalid, 0 Unknown, 227 Unchecked, 0.1s Time] [2022-01-28 15:00:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-28 15:00:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 743. [2022-01-28 15:00:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.3059299191374665) internal successors, (2453), 742 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2453 transitions. [2022-01-28 15:00:18,464 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2453 transitions. Word has length 21 [2022-01-28 15:00:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:18,464 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 2453 transitions. [2022-01-28 15:00:18,464 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) [2022-01-28 15:00:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2453 transitions. [2022-01-28 15:00:18,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:18,465 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:18,465 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:18,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Ended with exit code 0 [2022-01-28 15:00:18,665 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 [2022-01-28 15:00:18,665 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:18,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1008307394, now seen corresponding path program 547 times [2022-01-28 15:00:18,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:18,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94789816] [2022-01-28 15:00:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:18,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:18,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:18,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94789816] [2022-01-28 15:00:18,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94789816] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:18,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930182878] [2022-01-28 15:00:18,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:18,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:18,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:18,786 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) [2022-01-28 15:00:18,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Waiting until timeout for monitored process [2022-01-28 15:00:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:18,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:18,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:18,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:19,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:19,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:19,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:19,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:19,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:19,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:19,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:19,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:19,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:19,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:19,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930182878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:19,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:19,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:19,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496914632] [2022-01-28 15:00:19,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:19,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:19,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:19,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:19,448 INFO L87 Difference]: Start difference. First operand 743 states and 2453 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) [2022-01-28 15:00:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:19,711 INFO L93 Difference]: Finished difference Result 972 states and 3082 transitions. [2022-01-28 15:00:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:00:19,711 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 [2022-01-28 15:00:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:19,712 INFO L225 Difference]: With dead ends: 972 [2022-01-28 15:00:19,712 INFO L226 Difference]: Without dead ends: 934 [2022-01-28 15:00:19,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:19,713 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:19,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 238 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 531 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-01-28 15:00:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-01-28 15:00:19,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 751. [2022-01-28 15:00:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.2986666666666666) internal successors, (2474), 750 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2474 transitions. [2022-01-28 15:00:19,721 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2474 transitions. Word has length 21 [2022-01-28 15:00:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:19,722 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2474 transitions. [2022-01-28 15:00:19,722 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) [2022-01-28 15:00:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2474 transitions. [2022-01-28 15:00:19,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:19,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:19,722 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:19,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Ended with exit code 0 [2022-01-28 15:00:19,923 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 [2022-01-28 15:00:19,923 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash 332925466, now seen corresponding path program 548 times [2022-01-28 15:00:19,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:19,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364543602] [2022-01-28 15:00:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:19,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:20,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:20,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364543602] [2022-01-28 15:00:20,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364543602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:20,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067211222] [2022-01-28 15:00:20,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:20,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:20,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:20,051 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) [2022-01-28 15:00:20,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Waiting until timeout for monitored process [2022-01-28 15:00:20,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:20,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:20,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:20,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:20,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:20,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:20,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:20,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:20,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:20,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:20,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:20,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:20,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:20,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:20,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:20,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067211222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:20,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:20,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:20,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32446241] [2022-01-28 15:00:20,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:20,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:20,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:20,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:20,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:20,756 INFO L87 Difference]: Start difference. First operand 751 states and 2474 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) [2022-01-28 15:00:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:20,983 INFO L93 Difference]: Finished difference Result 929 states and 2964 transitions. [2022-01-28 15:00:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:00:20,983 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 [2022-01-28 15:00:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:20,984 INFO L225 Difference]: With dead ends: 929 [2022-01-28 15:00:20,985 INFO L226 Difference]: Without dead ends: 923 [2022-01-28 15:00:20,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:20,985 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:20,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 193 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 418 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-01-28 15:00:20,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-28 15:00:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 739. [2022-01-28 15:00:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.3021680216802167) internal successors, (2437), 738 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) [2022-01-28 15:00:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2437 transitions. [2022-01-28 15:00:20,993 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2437 transitions. Word has length 21 [2022-01-28 15:00:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:20,994 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2437 transitions. [2022-01-28 15:00:20,994 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) [2022-01-28 15:00:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2437 transitions. [2022-01-28 15:00:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:20,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:20,994 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:21,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Ended with exit code 0 [2022-01-28 15:00:21,195 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 [2022-01-28 15:00:21,195 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:21,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1525376415, now seen corresponding path program 549 times [2022-01-28 15:00:21,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:21,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488295494] [2022-01-28 15:00:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:21,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:21,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488295494] [2022-01-28 15:00:21,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488295494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:21,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947836535] [2022-01-28 15:00:21,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:21,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:21,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:21,324 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) [2022-01-28 15:00:21,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Waiting until timeout for monitored process [2022-01-28 15:00:21,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:00:21,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:21,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:21,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:21,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:21,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:21,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:21,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:21,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:21,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:21,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:21,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:21,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:21,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:21,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:21,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:21,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:21,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947836535] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:21,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:21,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:21,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214556577] [2022-01-28 15:00:21,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:21,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:21,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:21,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:21,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:21,947 INFO L87 Difference]: Start difference. First operand 739 states and 2437 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) [2022-01-28 15:00:22,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:22,314 INFO L93 Difference]: Finished difference Result 1017 states and 3234 transitions. [2022-01-28 15:00:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:00:22,314 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 [2022-01-28 15:00:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:22,316 INFO L225 Difference]: With dead ends: 1017 [2022-01-28 15:00:22,316 INFO L226 Difference]: Without dead ends: 990 [2022-01-28 15:00:22,316 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 [2022-01-28 15:00:22,316 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:22,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 233 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 653 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-01-28 15:00:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-28 15:00:22,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 741. [2022-01-28 15:00:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.304054054054054) internal successors, (2445), 740 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2445 transitions. [2022-01-28 15:00:22,328 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2445 transitions. Word has length 21 [2022-01-28 15:00:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:22,329 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2445 transitions. [2022-01-28 15:00:22,329 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) [2022-01-28 15:00:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2445 transitions. [2022-01-28 15:00:22,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:22,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:22,330 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] [2022-01-28 15:00:22,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:22,547 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 [2022-01-28 15:00:22,547 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1478691047, now seen corresponding path program 550 times [2022-01-28 15:00:22,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:22,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291761771] [2022-01-28 15:00:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:22,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:22,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291761771] [2022-01-28 15:00:22,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291761771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804951294] [2022-01-28 15:00:22,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:22,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:22,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:22,660 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) [2022-01-28 15:00:22,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Waiting until timeout for monitored process [2022-01-28 15:00:22,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:22,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:22,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:22,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:22,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:22,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:22,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:22,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:22,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:22,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:23,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:23,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:23,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:23,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:23,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:23,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:23,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804951294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:23,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:23,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:23,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389887533] [2022-01-28 15:00:23,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:23,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:23,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:23,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:23,090 INFO L87 Difference]: Start difference. First operand 741 states and 2445 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) [2022-01-28 15:00:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:23,259 INFO L93 Difference]: Finished difference Result 830 states and 2688 transitions. [2022-01-28 15:00:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:00:23,260 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 [2022-01-28 15:00:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:23,261 INFO L225 Difference]: With dead ends: 830 [2022-01-28 15:00:23,261 INFO L226 Difference]: Without dead ends: 801 [2022-01-28 15:00:23,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:23,261 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:23,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 162 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 447 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-01-28 15:00:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-28 15:00:23,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 742. [2022-01-28 15:00:23,268 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) [2022-01-28 15:00:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2448 transitions. [2022-01-28 15:00:23,269 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2448 transitions. Word has length 21 [2022-01-28 15:00:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:23,269 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2448 transitions. [2022-01-28 15:00:23,269 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) [2022-01-28 15:00:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2448 transitions. [2022-01-28 15:00:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:23,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:23,270 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] [2022-01-28 15:00:23,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Ended with exit code 0 [2022-01-28 15:00:23,470 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 [2022-01-28 15:00:23,470 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1500269663, now seen corresponding path program 551 times [2022-01-28 15:00:23,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:23,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075227889] [2022-01-28 15:00:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:23,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:23,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:23,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075227889] [2022-01-28 15:00:23,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075227889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:23,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222592662] [2022-01-28 15:00:23,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:23,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:23,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:23,591 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) [2022-01-28 15:00:23,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Waiting until timeout for monitored process [2022-01-28 15:00:23,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:23,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:23,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:23,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:23,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:23,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:23,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:23,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:23,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:23,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:24,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:24,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:24,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:24,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:24,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:24,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:24,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:24,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222592662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:24,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:24,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:24,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241142767] [2022-01-28 15:00:24,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:24,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:24,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:24,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:24,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:24,304 INFO L87 Difference]: Start difference. First operand 742 states and 2448 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) [2022-01-28 15:00:24,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:24,656 INFO L93 Difference]: Finished difference Result 990 states and 3156 transitions. [2022-01-28 15:00:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:00:24,657 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 [2022-01-28 15:00:24,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:24,658 INFO L225 Difference]: With dead ends: 990 [2022-01-28 15:00:24,658 INFO L226 Difference]: Without dead ends: 979 [2022-01-28 15:00:24,658 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 [2022-01-28 15:00:24,659 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:24,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 189 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 615 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-28 15:00:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-01-28 15:00:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 742. [2022-01-28 15:00:24,666 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) [2022-01-28 15:00:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2448 transitions. [2022-01-28 15:00:24,667 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2448 transitions. Word has length 21 [2022-01-28 15:00:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:24,667 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2448 transitions. [2022-01-28 15:00:24,668 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) [2022-01-28 15:00:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2448 transitions. [2022-01-28 15:00:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:24,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:24,668 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:24,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Ended with exit code 0 [2022-01-28 15:00:24,869 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 [2022-01-28 15:00:24,869 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:24,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1766858339, now seen corresponding path program 552 times [2022-01-28 15:00:24,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:24,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433077018] [2022-01-28 15:00:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:24,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:24,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:24,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433077018] [2022-01-28 15:00:24,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433077018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:24,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365287386] [2022-01-28 15:00:24,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:24,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:24,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:24,976 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) [2022-01-28 15:00:24,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Waiting until timeout for monitored process [2022-01-28 15:00:25,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:00:25,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:25,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:25,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:25,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:25,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:25,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:25,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:25,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:25,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:25,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:25,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:25,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:25,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:25,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:25,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:25,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365287386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:25,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:25,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:25,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777960075] [2022-01-28 15:00:25,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:25,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:25,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:25,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:25,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:25,488 INFO L87 Difference]: Start difference. First operand 742 states and 2448 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) [2022-01-28 15:00:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:25,680 INFO L93 Difference]: Finished difference Result 920 states and 2853 transitions. [2022-01-28 15:00:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:25,680 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 [2022-01-28 15:00:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:25,682 INFO L225 Difference]: With dead ends: 920 [2022-01-28 15:00:25,682 INFO L226 Difference]: Without dead ends: 894 [2022-01-28 15:00:25,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:25,682 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:25,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 242 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 442 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-01-28 15:00:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-01-28 15:00:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 759. [2022-01-28 15:00:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.2810026385224274) internal successors, (2487), 758 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2487 transitions. [2022-01-28 15:00:25,691 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2487 transitions. Word has length 21 [2022-01-28 15:00:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:25,691 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2487 transitions. [2022-01-28 15:00:25,691 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) [2022-01-28 15:00:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2487 transitions. [2022-01-28 15:00:25,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:25,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:25,692 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:25,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Ended with exit code 0 [2022-01-28 15:00:25,892 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 [2022-01-28 15:00:25,892 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2034805789, now seen corresponding path program 553 times [2022-01-28 15:00:25,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:25,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014712204] [2022-01-28 15:00:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:25,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:25,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014712204] [2022-01-28 15:00:25,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014712204] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511666864] [2022-01-28 15:00:25,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:25,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:25,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:25,998 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) [2022-01-28 15:00:25,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Waiting until timeout for monitored process [2022-01-28 15:00:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:26,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:26,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:26,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:26,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:26,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:26,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:26,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:26,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:26,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:26,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:26,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:26,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:26,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:26,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511666864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:26,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:26,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:26,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622420477] [2022-01-28 15:00:26,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:26,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:26,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:26,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:26,551 INFO L87 Difference]: Start difference. First operand 759 states and 2487 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) [2022-01-28 15:00:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:26,765 INFO L93 Difference]: Finished difference Result 890 states and 2787 transitions. [2022-01-28 15:00:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:26,765 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 [2022-01-28 15:00:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:26,767 INFO L225 Difference]: With dead ends: 890 [2022-01-28 15:00:26,767 INFO L226 Difference]: Without dead ends: 874 [2022-01-28 15:00:26,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:26,767 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:26,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 261 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 497 Invalid, 0 Unknown, 227 Unchecked, 0.2s Time] [2022-01-28 15:00:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-01-28 15:00:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 757. [2022-01-28 15:00:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.2830687830687832) internal successors, (2482), 756 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) [2022-01-28 15:00:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2482 transitions. [2022-01-28 15:00:26,775 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2482 transitions. Word has length 21 [2022-01-28 15:00:26,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:26,775 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2482 transitions. [2022-01-28 15:00:26,775 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) [2022-01-28 15:00:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2482 transitions. [2022-01-28 15:00:26,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:26,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:26,776 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:26,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:26,976 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 [2022-01-28 15:00:26,977 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:26,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1430766955, now seen corresponding path program 554 times [2022-01-28 15:00:26,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:26,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271575063] [2022-01-28 15:00:26,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:26,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:27,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:27,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271575063] [2022-01-28 15:00:27,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271575063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:27,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933878189] [2022-01-28 15:00:27,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:27,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:27,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:27,094 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) [2022-01-28 15:00:27,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Waiting until timeout for monitored process [2022-01-28 15:00:27,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:27,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:27,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:27,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:27,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:27,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:27,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:27,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:27,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:27,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:27,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:27,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:27,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:27,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:27,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:27,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:27,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933878189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:27,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:27,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:27,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783576785] [2022-01-28 15:00:27,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:27,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:27,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:27,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:27,820 INFO L87 Difference]: Start difference. First operand 757 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) [2022-01-28 15:00:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:28,064 INFO L93 Difference]: Finished difference Result 996 states and 3166 transitions. [2022-01-28 15:00:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:28,065 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 [2022-01-28 15:00:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:28,066 INFO L225 Difference]: With dead ends: 996 [2022-01-28 15:00:28,066 INFO L226 Difference]: Without dead ends: 954 [2022-01-28 15:00:28,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:28,066 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:28,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 188 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 503 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-01-28 15:00:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-01-28 15:00:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 763. [2022-01-28 15:00:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.286089238845144) internal successors, (2504), 762 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) [2022-01-28 15:00:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2504 transitions. [2022-01-28 15:00:28,075 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2504 transitions. Word has length 21 [2022-01-28 15:00:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:28,075 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2504 transitions. [2022-01-28 15:00:28,075 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) [2022-01-28 15:00:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2504 transitions. [2022-01-28 15:00:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:28,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:28,076 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:28,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Ended with exit code 0 [2022-01-28 15:00:28,277 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 [2022-01-28 15:00:28,277 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:28,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2017682557, now seen corresponding path program 555 times [2022-01-28 15:00:28,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:28,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990335788] [2022-01-28 15:00:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:28,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:28,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:28,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990335788] [2022-01-28 15:00:28,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990335788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:28,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748569822] [2022-01-28 15:00:28,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:28,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:28,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:28,396 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) [2022-01-28 15:00:28,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Waiting until timeout for monitored process [2022-01-28 15:00:28,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:00:28,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:28,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:28,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:28,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:28,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:28,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:28,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:28,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:28,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:29,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:29,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:29,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:29,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:29,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:29,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:29,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748569822] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:29,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:29,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:29,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578777348] [2022-01-28 15:00:29,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:29,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:29,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:29,123 INFO L87 Difference]: Start difference. First operand 763 states and 2504 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) [2022-01-28 15:00:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:29,409 INFO L93 Difference]: Finished difference Result 1012 states and 3180 transitions. [2022-01-28 15:00:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:29,409 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 [2022-01-28 15:00:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:29,411 INFO L225 Difference]: With dead ends: 1012 [2022-01-28 15:00:29,411 INFO L226 Difference]: Without dead ends: 982 [2022-01-28 15:00:29,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:29,411 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:29,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 243 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 628 Invalid, 0 Unknown, 134 Unchecked, 0.2s Time] [2022-01-28 15:00:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-01-28 15:00:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 769. [2022-01-28 15:00:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.2786458333333335) internal successors, (2518), 768 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) [2022-01-28 15:00:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2518 transitions. [2022-01-28 15:00:29,420 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2518 transitions. Word has length 21 [2022-01-28 15:00:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:29,420 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2518 transitions. [2022-01-28 15:00:29,420 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) [2022-01-28 15:00:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2518 transitions. [2022-01-28 15:00:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:29,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:29,421 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:29,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Ended with exit code 0 [2022-01-28 15:00:29,621 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 [2022-01-28 15:00:29,622 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:29,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1342300629, now seen corresponding path program 556 times [2022-01-28 15:00:29,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:29,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13886167] [2022-01-28 15:00:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:29,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:29,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13886167] [2022-01-28 15:00:29,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13886167] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171539366] [2022-01-28 15:00:29,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:29,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:29,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:29,746 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) [2022-01-28 15:00:29,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Waiting until timeout for monitored process [2022-01-28 15:00:29,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:29,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:29,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:29,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:29,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:29,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:30,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:30,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:30,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:30,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:30,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:30,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:30,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:30,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:30,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:30,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:30,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171539366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:30,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:30,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:30,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611036147] [2022-01-28 15:00:30,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:30,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:30,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:30,499 INFO L87 Difference]: Start difference. First operand 769 states and 2518 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) [2022-01-28 15:00:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:30,705 INFO L93 Difference]: Finished difference Result 978 states and 3098 transitions. [2022-01-28 15:00:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:30,705 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 [2022-01-28 15:00:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:30,706 INFO L225 Difference]: With dead ends: 978 [2022-01-28 15:00:30,706 INFO L226 Difference]: Without dead ends: 972 [2022-01-28 15:00:30,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:30,707 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:30,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 226 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 383 Invalid, 0 Unknown, 180 Unchecked, 0.1s Time] [2022-01-28 15:00:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-01-28 15:00:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 765. [2022-01-28 15:00:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.2840314136125652) internal successors, (2509), 764 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) [2022-01-28 15:00:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2509 transitions. [2022-01-28 15:00:30,716 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2509 transitions. Word has length 21 [2022-01-28 15:00:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:30,716 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2509 transitions. [2022-01-28 15:00:30,716 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) [2022-01-28 15:00:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2509 transitions. [2022-01-28 15:00:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:30,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:30,717 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:30,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Ended with exit code 0 [2022-01-28 15:00:30,917 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 [2022-01-28 15:00:30,917 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1392544211, now seen corresponding path program 557 times [2022-01-28 15:00:30,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:30,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553422136] [2022-01-28 15:00:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:30,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:31,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:31,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553422136] [2022-01-28 15:00:31,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553422136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:31,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792171384] [2022-01-28 15:00:31,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:31,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:31,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:31,027 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) [2022-01-28 15:00:31,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Waiting until timeout for monitored process [2022-01-28 15:00:31,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:31,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:31,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:31,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:31,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:31,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:31,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:31,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:31,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:31,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:31,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:31,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:31,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:31,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:31,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:31,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792171384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:31,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:31,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:31,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101198925] [2022-01-28 15:00:31,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:31,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:31,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:31,520 INFO L87 Difference]: Start difference. First operand 765 states and 2509 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) [2022-01-28 15:00:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:31,708 INFO L93 Difference]: Finished difference Result 879 states and 2784 transitions. [2022-01-28 15:00:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:31,708 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 [2022-01-28 15:00:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:31,709 INFO L225 Difference]: With dead ends: 879 [2022-01-28 15:00:31,709 INFO L226 Difference]: Without dead ends: 819 [2022-01-28 15:00:31,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:31,710 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:31,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 200 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 500 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-01-28 15:00:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-01-28 15:00:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 748. [2022-01-28 15:00:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.2998661311914326) internal successors, (2465), 747 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2465 transitions. [2022-01-28 15:00:31,718 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2465 transitions. Word has length 21 [2022-01-28 15:00:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:31,718 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2465 transitions. [2022-01-28 15:00:31,718 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) [2022-01-28 15:00:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2465 transitions. [2022-01-28 15:00:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:31,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:31,719 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:31,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Ended with exit code 0 [2022-01-28 15:00:31,919 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 [2022-01-28 15:00:31,919 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash -838815277, now seen corresponding path program 558 times [2022-01-28 15:00:31,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:31,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306602979] [2022-01-28 15:00:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:31,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:32,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306602979] [2022-01-28 15:00:32,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306602979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512015229] [2022-01-28 15:00:32,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:32,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:32,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:32,038 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) [2022-01-28 15:00:32,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Waiting until timeout for monitored process [2022-01-28 15:00:32,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:00:32,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:32,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:32,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:32,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:32,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:32,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:32,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:32,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:32,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:32,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:32,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:32,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:32,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:32,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:32,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512015229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:32,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:32,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:32,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079378003] [2022-01-28 15:00:32,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:32,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:32,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:32,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:32,711 INFO L87 Difference]: Start difference. First operand 748 states and 2465 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) [2022-01-28 15:00:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:32,945 INFO L93 Difference]: Finished difference Result 957 states and 3051 transitions. [2022-01-28 15:00:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:32,945 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 [2022-01-28 15:00:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:32,947 INFO L225 Difference]: With dead ends: 957 [2022-01-28 15:00:32,947 INFO L226 Difference]: Without dead ends: 939 [2022-01-28 15:00:32,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:32,947 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:32,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 196 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 447 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2022-01-28 15:00:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-01-28 15:00:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 749. [2022-01-28 15:00:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.299465240641711) internal successors, (2468), 748 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2468 transitions. [2022-01-28 15:00:32,956 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2468 transitions. Word has length 21 [2022-01-28 15:00:32,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:32,956 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2468 transitions. [2022-01-28 15:00:32,956 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) [2022-01-28 15:00:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2468 transitions. [2022-01-28 15:00:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:32,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:32,957 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:32,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Ended with exit code 0 [2022-01-28 15:00:33,157 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 [2022-01-28 15:00:33,158 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:33,158 INFO L85 PathProgramCache]: Analyzing trace with hash -251899675, now seen corresponding path program 559 times [2022-01-28 15:00:33,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:33,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948441033] [2022-01-28 15:00:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:33,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:33,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:33,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948441033] [2022-01-28 15:00:33,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948441033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:33,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174387760] [2022-01-28 15:00:33,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:33,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:33,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:33,274 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) [2022-01-28 15:00:33,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Waiting until timeout for monitored process [2022-01-28 15:00:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:33,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:33,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:33,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:33,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:33,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:33,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:33,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:33,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:33,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:33,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:33,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:33,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:33,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:33,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:33,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174387760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:33,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:33,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:33,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110651097] [2022-01-28 15:00:33,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:33,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:33,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:33,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:33,956 INFO L87 Difference]: Start difference. First operand 749 states and 2468 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) [2022-01-28 15:00:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:34,251 INFO L93 Difference]: Finished difference Result 977 states and 3085 transitions. [2022-01-28 15:00:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:34,251 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 [2022-01-28 15:00:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:34,253 INFO L225 Difference]: With dead ends: 977 [2022-01-28 15:00:34,253 INFO L226 Difference]: Without dead ends: 963 [2022-01-28 15:00:34,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:34,253 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:34,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 235 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 623 Invalid, 0 Unknown, 288 Unchecked, 0.2s Time] [2022-01-28 15:00:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-01-28 15:00:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 740. [2022-01-28 15:00:34,261 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) [2022-01-28 15:00:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2441 transitions. [2022-01-28 15:00:34,262 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2441 transitions. Word has length 21 [2022-01-28 15:00:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:34,262 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2441 transitions. [2022-01-28 15:00:34,262 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) [2022-01-28 15:00:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2441 transitions. [2022-01-28 15:00:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:34,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:34,263 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:34,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:34,463 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 [2022-01-28 15:00:34,464 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1098797122, now seen corresponding path program 560 times [2022-01-28 15:00:34,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912291911] [2022-01-28 15:00:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:34,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:34,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:34,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912291911] [2022-01-28 15:00:34,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912291911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:34,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213246698] [2022-01-28 15:00:34,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:34,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:34,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:34,587 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) [2022-01-28 15:00:34,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Waiting until timeout for monitored process [2022-01-28 15:00:34,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:34,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:34,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:34,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:34,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:34,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:34,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:34,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:34,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:34,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:34,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:35,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:35,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:35,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:35,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:35,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:35,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:35,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213246698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:35,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:35,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:35,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533099681] [2022-01-28 15:00:35,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:35,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:35,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:35,222 INFO L87 Difference]: Start difference. First operand 740 states and 2441 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) [2022-01-28 15:00:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:35,621 INFO L93 Difference]: Finished difference Result 991 states and 3150 transitions. [2022-01-28 15:00:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:00:35,621 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 [2022-01-28 15:00:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:35,623 INFO L225 Difference]: With dead ends: 991 [2022-01-28 15:00:35,623 INFO L226 Difference]: Without dead ends: 968 [2022-01-28 15:00:35,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:00:35,623 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:35,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 263 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 614 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-01-28 15:00:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-01-28 15:00:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 742. [2022-01-28 15:00:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.300944669365722) internal successors, (2446), 741 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) [2022-01-28 15:00:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2446 transitions. [2022-01-28 15:00:35,632 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2446 transitions. Word has length 21 [2022-01-28 15:00:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:35,632 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2446 transitions. [2022-01-28 15:00:35,632 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) [2022-01-28 15:00:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2446 transitions. [2022-01-28 15:00:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:35,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:35,634 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:35,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:35,834 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 [2022-01-28 15:00:35,834 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1933420152, now seen corresponding path program 561 times [2022-01-28 15:00:35,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:35,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207036790] [2022-01-28 15:00:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:35,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:35,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207036790] [2022-01-28 15:00:35,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207036790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063371643] [2022-01-28 15:00:35,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:35,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:35,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:35,955 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) [2022-01-28 15:00:35,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Waiting until timeout for monitored process [2022-01-28 15:00:35,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:00:35,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:35,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:36,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:36,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:36,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:36,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:36,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:36,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:36,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:36,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:36,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:36,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:36,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:36,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:36,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:36,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063371643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:36,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:36,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:36,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483996791] [2022-01-28 15:00:36,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:36,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:36,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:36,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:36,615 INFO L87 Difference]: Start difference. First operand 742 states and 2446 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) [2022-01-28 15:00:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:36,856 INFO L93 Difference]: Finished difference Result 945 states and 3017 transitions. [2022-01-28 15:00:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:36,856 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 [2022-01-28 15:00:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:36,857 INFO L225 Difference]: With dead ends: 945 [2022-01-28 15:00:36,857 INFO L226 Difference]: Without dead ends: 926 [2022-01-28 15:00:36,858 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 [2022-01-28 15:00:36,858 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:36,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 220 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 455 Invalid, 0 Unknown, 232 Unchecked, 0.2s Time] [2022-01-28 15:00:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-28 15:00:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 740. [2022-01-28 15:00:36,872 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) [2022-01-28 15:00:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2441 transitions. [2022-01-28 15:00:36,874 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2441 transitions. Word has length 21 [2022-01-28 15:00:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:36,874 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2441 transitions. [2022-01-28 15:00:36,874 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) [2022-01-28 15:00:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2441 transitions. [2022-01-28 15:00:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:36,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:36,875 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:36,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Ended with exit code 0 [2022-01-28 15:00:37,075 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 [2022-01-28 15:00:37,075 INFO L402 AbstractCegarLoop]: === Iteration 574 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -727582733, now seen corresponding path program 562 times [2022-01-28 15:00:37,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407062037] [2022-01-28 15:00:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:37,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:37,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:37,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407062037] [2022-01-28 15:00:37,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407062037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:37,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079782906] [2022-01-28 15:00:37,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:37,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:37,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:37,219 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) [2022-01-28 15:00:37,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Waiting until timeout for monitored process [2022-01-28 15:00:37,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:37,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:37,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:37,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:37,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:37,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:37,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:37,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:37,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:37,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:37,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:37,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:37,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:37,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:37,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:37,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:37,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:37,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079782906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:37,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:37,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:37,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755851099] [2022-01-28 15:00:37,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:37,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:37,822 INFO L87 Difference]: Start difference. First operand 740 states and 2441 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) [2022-01-28 15:00:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:38,135 INFO L93 Difference]: Finished difference Result 941 states and 3021 transitions. [2022-01-28 15:00:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:00:38,135 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 [2022-01-28 15:00:38,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:38,136 INFO L225 Difference]: With dead ends: 941 [2022-01-28 15:00:38,136 INFO L226 Difference]: Without dead ends: 920 [2022-01-28 15:00:38,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:38,137 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:38,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 223 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 708 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-01-28 15:00:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-01-28 15:00:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 740. [2022-01-28 15:00:38,144 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) [2022-01-28 15:00:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2441 transitions. [2022-01-28 15:00:38,145 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2441 transitions. Word has length 21 [2022-01-28 15:00:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:38,145 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2441 transitions. [2022-01-28 15:00:38,146 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) [2022-01-28 15:00:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2441 transitions. [2022-01-28 15:00:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:38,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:38,146 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:38,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:38,347 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 [2022-01-28 15:00:38,347 INFO L402 AbstractCegarLoop]: === Iteration 575 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:38,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash -458707641, now seen corresponding path program 563 times [2022-01-28 15:00:38,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:38,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318725481] [2022-01-28 15:00:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:38,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:38,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:38,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318725481] [2022-01-28 15:00:38,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318725481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:38,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779399035] [2022-01-28 15:00:38,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:38,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:38,471 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) [2022-01-28 15:00:38,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Waiting until timeout for monitored process [2022-01-28 15:00:38,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:00:38,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:38,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:38,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:38,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:38,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:38,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:38,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:38,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:38,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:38,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:38,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:39,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:39,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:39,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:39,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:39,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779399035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:39,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:39,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:39,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078738] [2022-01-28 15:00:39,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:39,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:39,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:39,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:39,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:39,082 INFO L87 Difference]: Start difference. First operand 740 states and 2441 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) [2022-01-28 15:00:39,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:39,329 INFO L93 Difference]: Finished difference Result 958 states and 3049 transitions. [2022-01-28 15:00:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:39,329 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 [2022-01-28 15:00:39,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:39,331 INFO L225 Difference]: With dead ends: 958 [2022-01-28 15:00:39,331 INFO L226 Difference]: Without dead ends: 943 [2022-01-28 15:00:39,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:00:39,331 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:39,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 183 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 513 Invalid, 0 Unknown, 275 Unchecked, 0.2s Time] [2022-01-28 15:00:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-01-28 15:00:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 733. [2022-01-28 15:00:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.296448087431694) internal successors, (2413), 732 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2413 transitions. [2022-01-28 15:00:39,340 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2413 transitions. Word has length 21 [2022-01-28 15:00:39,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:39,340 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2413 transitions. [2022-01-28 15:00:39,340 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) [2022-01-28 15:00:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2413 transitions. [2022-01-28 15:00:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:39,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:39,341 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:39,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Ended with exit code 0 [2022-01-28 15:00:39,541 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 [2022-01-28 15:00:39,541 INFO L402 AbstractCegarLoop]: === Iteration 576 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:39,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:39,541 INFO L85 PathProgramCache]: Analyzing trace with hash 426532036, now seen corresponding path program 564 times [2022-01-28 15:00:39,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:39,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601362892] [2022-01-28 15:00:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:39,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:39,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601362892] [2022-01-28 15:00:39,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601362892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158265216] [2022-01-28 15:00:39,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:39,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:39,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:39,671 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) [2022-01-28 15:00:39,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Waiting until timeout for monitored process [2022-01-28 15:00:39,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:00:39,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:39,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:39,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:39,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:39,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:39,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:39,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:39,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:39,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:39,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:40,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:40,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:40,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:40,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:40,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:40,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:40,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158265216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:40,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:40,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:40,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635740770] [2022-01-28 15:00:40,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:40,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:40,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:40,199 INFO L87 Difference]: Start difference. First operand 733 states and 2413 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) [2022-01-28 15:00:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:40,630 INFO L93 Difference]: Finished difference Result 968 states and 3115 transitions. [2022-01-28 15:00:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:40,630 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 [2022-01-28 15:00:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:40,632 INFO L225 Difference]: With dead ends: 968 [2022-01-28 15:00:40,632 INFO L226 Difference]: Without dead ends: 945 [2022-01-28 15:00:40,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:40,633 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:40,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 201 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 620 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2022-01-28 15:00:40,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-01-28 15:00:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 737. [2022-01-28 15:00:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.3002717391304346) internal successors, (2429), 736 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) [2022-01-28 15:00:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2429 transitions. [2022-01-28 15:00:40,645 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2429 transitions. Word has length 21 [2022-01-28 15:00:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:40,645 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2429 transitions. [2022-01-28 15:00:40,645 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) [2022-01-28 15:00:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2429 transitions. [2022-01-28 15:00:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:40,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:40,646 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] [2022-01-28 15:00:40,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:40,859 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 [2022-01-28 15:00:40,859 INFO L402 AbstractCegarLoop]: === Iteration 577 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1029773033, now seen corresponding path program 565 times [2022-01-28 15:00:40,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:40,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297064386] [2022-01-28 15:00:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:40,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:41,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297064386] [2022-01-28 15:00:41,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297064386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416583955] [2022-01-28 15:00:41,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:41,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:41,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:41,028 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) [2022-01-28 15:00:41,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Waiting until timeout for monitored process [2022-01-28 15:00:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:41,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:41,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:41,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:41,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:41,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:41,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:41,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:41,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:41,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:41,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:41,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:41,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:41,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:41,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416583955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:41,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:41,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:41,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976678339] [2022-01-28 15:00:41,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:41,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:41,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:41,576 INFO L87 Difference]: Start difference. First operand 737 states and 2429 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) [2022-01-28 15:00:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:41,963 INFO L93 Difference]: Finished difference Result 1098 states and 3492 transitions. [2022-01-28 15:00:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:00:41,963 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 [2022-01-28 15:00:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:41,965 INFO L225 Difference]: With dead ends: 1098 [2022-01-28 15:00:41,965 INFO L226 Difference]: Without dead ends: 1071 [2022-01-28 15:00:41,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:00:41,965 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 89 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:41,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 167 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 514 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-01-28 15:00:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-01-28 15:00:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 737. [2022-01-28 15:00:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.3002717391304346) internal successors, (2429), 736 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) [2022-01-28 15:00:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2429 transitions. [2022-01-28 15:00:41,975 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2429 transitions. Word has length 21 [2022-01-28 15:00:41,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:41,975 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2429 transitions. [2022-01-28 15:00:41,975 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) [2022-01-28 15:00:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2429 transitions. [2022-01-28 15:00:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:41,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:41,976 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:41,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Ended with exit code 0 [2022-01-28 15:00:42,176 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 [2022-01-28 15:00:42,176 INFO L402 AbstractCegarLoop]: === Iteration 578 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:42,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1837830956, now seen corresponding path program 566 times [2022-01-28 15:00:42,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:42,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925067894] [2022-01-28 15:00:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:42,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:42,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:42,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925067894] [2022-01-28 15:00:42,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925067894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:42,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485564364] [2022-01-28 15:00:42,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:42,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:42,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:42,298 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) [2022-01-28 15:00:42,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Waiting until timeout for monitored process [2022-01-28 15:00:42,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:42,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:42,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:42,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:42,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:42,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:42,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:42,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:42,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:42,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:42,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:42,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:42,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:42,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:42,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:42,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:42,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485564364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:42,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:42,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:42,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077663667] [2022-01-28 15:00:42,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:42,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:42,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:42,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:42,796 INFO L87 Difference]: Start difference. First operand 737 states and 2429 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) [2022-01-28 15:00:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:43,148 INFO L93 Difference]: Finished difference Result 1028 states and 3267 transitions. [2022-01-28 15:00:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:00:43,149 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 [2022-01-28 15:00:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:43,150 INFO L225 Difference]: With dead ends: 1028 [2022-01-28 15:00:43,150 INFO L226 Difference]: Without dead ends: 1001 [2022-01-28 15:00:43,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:43,150 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:43,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 243 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 514 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-01-28 15:00:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-01-28 15:00:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 737. [2022-01-28 15:00:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.297554347826087) internal successors, (2427), 736 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2427 transitions. [2022-01-28 15:00:43,159 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2427 transitions. Word has length 21 [2022-01-28 15:00:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:43,159 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2427 transitions. [2022-01-28 15:00:43,159 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) [2022-01-28 15:00:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2427 transitions. [2022-01-28 15:00:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:43,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:43,160 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:43,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Ended with exit code 0 [2022-01-28 15:00:43,360 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 [2022-01-28 15:00:43,361 INFO L402 AbstractCegarLoop]: === Iteration 579 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:43,361 INFO L85 PathProgramCache]: Analyzing trace with hash 31709833, now seen corresponding path program 567 times [2022-01-28 15:00:43,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:43,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368836083] [2022-01-28 15:00:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:43,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:43,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:43,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368836083] [2022-01-28 15:00:43,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368836083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:43,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400700695] [2022-01-28 15:00:43,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:43,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:43,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:43,492 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) [2022-01-28 15:00:43,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Waiting until timeout for monitored process [2022-01-28 15:00:43,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:00:43,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:43,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:43,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:43,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:43,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:43,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:43,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:43,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:43,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:43,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:43,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:43,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:43,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:44,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:44,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:44,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400700695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:44,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:44,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:44,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698967095] [2022-01-28 15:00:44,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:44,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:44,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:44,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:44,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:44,054 INFO L87 Difference]: Start difference. First operand 737 states and 2427 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) [2022-01-28 15:00:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:44,590 INFO L93 Difference]: Finished difference Result 1034 states and 3309 transitions. [2022-01-28 15:00:44,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:00:44,590 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 [2022-01-28 15:00:44,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:44,591 INFO L225 Difference]: With dead ends: 1034 [2022-01-28 15:00:44,591 INFO L226 Difference]: Without dead ends: 1013 [2022-01-28 15:00:44,592 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 [2022-01-28 15:00:44,592 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:44,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 307 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 881 Invalid, 0 Unknown, 244 Unchecked, 0.3s Time] [2022-01-28 15:00:44,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-28 15:00:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 739. [2022-01-28 15:00:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.2981029810298104) internal successors, (2434), 738 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2434 transitions. [2022-01-28 15:00:44,600 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2434 transitions. Word has length 21 [2022-01-28 15:00:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:44,601 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2434 transitions. [2022-01-28 15:00:44,601 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) [2022-01-28 15:00:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2434 transitions. [2022-01-28 15:00:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:44,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:44,601 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:44,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:44,802 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 [2022-01-28 15:00:44,802 INFO L402 AbstractCegarLoop]: === Iteration 580 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:44,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:44,802 INFO L85 PathProgramCache]: Analyzing trace with hash -745174423, now seen corresponding path program 568 times [2022-01-28 15:00:44,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:44,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418383409] [2022-01-28 15:00:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:44,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:44,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:44,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418383409] [2022-01-28 15:00:44,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418383409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:44,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159651107] [2022-01-28 15:00:44,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:44,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:44,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:44,933 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) [2022-01-28 15:00:44,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Waiting until timeout for monitored process [2022-01-28 15:00:44,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:44,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:44,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:44,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:45,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:45,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:45,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:45,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:45,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:45,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:45,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:45,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:45,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:45,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:45,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:45,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:45,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:45,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159651107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:45,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:45,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:45,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775184176] [2022-01-28 15:00:45,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:45,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:45,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:45,483 INFO L87 Difference]: Start difference. First operand 739 states and 2434 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) [2022-01-28 15:00:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:45,919 INFO L93 Difference]: Finished difference Result 1038 states and 3311 transitions. [2022-01-28 15:00:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:00:45,920 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 [2022-01-28 15:00:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:45,921 INFO L225 Difference]: With dead ends: 1038 [2022-01-28 15:00:45,921 INFO L226 Difference]: Without dead ends: 1023 [2022-01-28 15:00:45,921 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 [2022-01-28 15:00:45,921 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:45,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 222 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 584 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-01-28 15:00:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-01-28 15:00:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 735. [2022-01-28 15:00:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.2997275204359675) internal successors, (2422), 734 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) [2022-01-28 15:00:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2422 transitions. [2022-01-28 15:00:45,930 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2422 transitions. Word has length 21 [2022-01-28 15:00:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:45,930 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2422 transitions. [2022-01-28 15:00:45,930 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) [2022-01-28 15:00:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2422 transitions. [2022-01-28 15:00:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:45,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:45,931 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:45,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Ended with exit code 0 [2022-01-28 15:00:46,132 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 [2022-01-28 15:00:46,132 INFO L402 AbstractCegarLoop]: === Iteration 581 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:46,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:46,132 INFO L85 PathProgramCache]: Analyzing trace with hash -914680815, now seen corresponding path program 569 times [2022-01-28 15:00:46,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:46,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407036167] [2022-01-28 15:00:46,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:46,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:46,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:46,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407036167] [2022-01-28 15:00:46,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407036167] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:46,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556231189] [2022-01-28 15:00:46,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:46,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:46,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:46,246 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) [2022-01-28 15:00:46,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Waiting until timeout for monitored process [2022-01-28 15:00:46,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:00:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:46,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:46,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:46,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:46,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:46,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:46,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:46,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:46,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:46,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:46,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:46,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:46,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:46,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:46,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:46,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556231189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:46,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:46,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 15:00:46,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225074092] [2022-01-28 15:00:46,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:46,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:00:46,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:46,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:00:46,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:00:46,656 INFO L87 Difference]: Start difference. First operand 735 states and 2422 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) [2022-01-28 15:00:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:46,781 INFO L93 Difference]: Finished difference Result 796 states and 2599 transitions. [2022-01-28 15:00:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:00:46,781 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 [2022-01-28 15:00:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:46,783 INFO L225 Difference]: With dead ends: 796 [2022-01-28 15:00:46,783 INFO L226 Difference]: Without dead ends: 774 [2022-01-28 15:00:46,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:00:46,783 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:46,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 103 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 329 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-01-28 15:00:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-01-28 15:00:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 738. [2022-01-28 15:00:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.3025780189959293) internal successors, (2434), 737 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2434 transitions. [2022-01-28 15:00:46,791 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2434 transitions. Word has length 21 [2022-01-28 15:00:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:46,791 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 2434 transitions. [2022-01-28 15:00:46,791 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) [2022-01-28 15:00:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2434 transitions. [2022-01-28 15:00:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:46,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:46,792 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:46,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:46,992 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 [2022-01-28 15:00:46,992 INFO L402 AbstractCegarLoop]: === Iteration 582 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:46,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1691565071, now seen corresponding path program 570 times [2022-01-28 15:00:46,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:46,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914348238] [2022-01-28 15:00:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:46,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:47,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:47,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914348238] [2022-01-28 15:00:47,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914348238] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:47,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938394400] [2022-01-28 15:00:47,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:47,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:47,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:47,111 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) [2022-01-28 15:00:47,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Waiting until timeout for monitored process [2022-01-28 15:00:47,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:00:47,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:47,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:47,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:47,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:47,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:47,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:47,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:47,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:47,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:47,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:47,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:47,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:47,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:47,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:47,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:47,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:47,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938394400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:47,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:47,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:47,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523027552] [2022-01-28 15:00:47,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:47,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:47,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:47,569 INFO L87 Difference]: Start difference. First operand 738 states and 2434 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) [2022-01-28 15:00:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:47,692 INFO L93 Difference]: Finished difference Result 893 states and 2862 transitions. [2022-01-28 15:00:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:00:47,692 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 [2022-01-28 15:00:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:47,694 INFO L225 Difference]: With dead ends: 893 [2022-01-28 15:00:47,694 INFO L226 Difference]: Without dead ends: 849 [2022-01-28 15:00:47,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:47,694 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:47,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 190 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 308 Invalid, 0 Unknown, 200 Unchecked, 0.1s Time] [2022-01-28 15:00:47,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-28 15:00:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 740. [2022-01-28 15:00:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.3058186738836266) internal successors, (2443), 739 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2443 transitions. [2022-01-28 15:00:47,702 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2443 transitions. Word has length 21 [2022-01-28 15:00:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:47,702 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2443 transitions. [2022-01-28 15:00:47,702 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) [2022-01-28 15:00:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2443 transitions. [2022-01-28 15:00:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:47,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:47,703 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] [2022-01-28 15:00:47,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Ended with exit code 0 [2022-01-28 15:00:47,903 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 [2022-01-28 15:00:47,903 INFO L402 AbstractCegarLoop]: === Iteration 583 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:47,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1725946248, now seen corresponding path program 571 times [2022-01-28 15:00:47,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:47,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419534702] [2022-01-28 15:00:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:47,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:48,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:48,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419534702] [2022-01-28 15:00:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419534702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:48,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265722850] [2022-01-28 15:00:48,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:48,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:48,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:48,012 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) [2022-01-28 15:00:48,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Waiting until timeout for monitored process [2022-01-28 15:00:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:48,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:48,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:48,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:48,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:48,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:48,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:48,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:48,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:48,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:48,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:48,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:48,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:48,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265722850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:48,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:48,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:48,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004577445] [2022-01-28 15:00:48,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:48,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:48,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:48,469 INFO L87 Difference]: Start difference. First operand 740 states and 2443 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) [2022-01-28 15:00:48,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:48,780 INFO L93 Difference]: Finished difference Result 943 states and 3043 transitions. [2022-01-28 15:00:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:00:48,780 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 [2022-01-28 15:00:48,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:48,782 INFO L225 Difference]: With dead ends: 943 [2022-01-28 15:00:48,782 INFO L226 Difference]: Without dead ends: 920 [2022-01-28 15:00:48,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:00:48,782 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:48,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 149 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 524 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-01-28 15:00:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-01-28 15:00:48,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 740. [2022-01-28 15:00:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.3058186738836266) internal successors, (2443), 739 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2443 transitions. [2022-01-28 15:00:48,791 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2443 transitions. Word has length 21 [2022-01-28 15:00:48,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:48,791 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2443 transitions. [2022-01-28 15:00:48,791 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) [2022-01-28 15:00:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2443 transitions. [2022-01-28 15:00:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:48,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:48,792 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:48,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:48,995 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 [2022-01-28 15:00:48,995 INFO L402 AbstractCegarLoop]: === Iteration 584 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1965780051, now seen corresponding path program 572 times [2022-01-28 15:00:48,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:48,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631496367] [2022-01-28 15:00:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:48,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:49,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:49,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631496367] [2022-01-28 15:00:49,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631496367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:49,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176581755] [2022-01-28 15:00:49,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:49,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:49,110 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) [2022-01-28 15:00:49,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Waiting until timeout for monitored process [2022-01-28 15:00:49,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:49,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:49,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:49,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:49,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:49,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:49,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:49,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:49,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:49,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:49,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:49,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:49,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:49,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:49,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:49,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:49,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:49,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176581755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:49,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:49,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:00:49,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641573982] [2022-01-28 15:00:49,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:49,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:49,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:49,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:49,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:49,589 INFO L87 Difference]: Start difference. First operand 740 states and 2443 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) [2022-01-28 15:00:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:50,007 INFO L93 Difference]: Finished difference Result 1056 states and 3386 transitions. [2022-01-28 15:00:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:00:50,007 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 [2022-01-28 15:00:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:50,009 INFO L225 Difference]: With dead ends: 1056 [2022-01-28 15:00:50,009 INFO L226 Difference]: Without dead ends: 1029 [2022-01-28 15:00:50,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:00:50,009 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:50,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 177 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 595 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-01-28 15:00:50,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-01-28 15:00:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 741. [2022-01-28 15:00:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3094594594594593) internal successors, (2449), 740 states have internal predecessors, (2449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:50,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2449 transitions. [2022-01-28 15:00:50,019 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2449 transitions. Word has length 21 [2022-01-28 15:00:50,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:50,019 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2449 transitions. [2022-01-28 15:00:50,019 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) [2022-01-28 15:00:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2449 transitions. [2022-01-28 15:00:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:50,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:50,020 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:50,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:50,220 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 [2022-01-28 15:00:50,220 INFO L402 AbstractCegarLoop]: === Iteration 585 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash -811170661, now seen corresponding path program 573 times [2022-01-28 15:00:50,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:50,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552678650] [2022-01-28 15:00:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:50,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:50,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:50,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552678650] [2022-01-28 15:00:50,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552678650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:50,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584344741] [2022-01-28 15:00:50,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:50,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:50,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:50,331 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) [2022-01-28 15:00:50,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Waiting until timeout for monitored process [2022-01-28 15:00:50,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:00:50,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:50,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:50,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:50,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:50,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:50,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:50,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:50,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:50,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:50,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:50,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:50,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:50,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:50,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:50,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584344741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:50,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:50,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 15:00:50,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724753346] [2022-01-28 15:00:50,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:50,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:00:50,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:00:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:00:50,719 INFO L87 Difference]: Start difference. First operand 741 states and 2449 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) [2022-01-28 15:00:50,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:50,948 INFO L93 Difference]: Finished difference Result 813 states and 2652 transitions. [2022-01-28 15:00:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:00:50,948 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 [2022-01-28 15:00:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:50,949 INFO L225 Difference]: With dead ends: 813 [2022-01-28 15:00:50,949 INFO L226 Difference]: Without dead ends: 784 [2022-01-28 15:00:50,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:00:50,949 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:50,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 171 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 642 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-01-28 15:00:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-01-28 15:00:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 740. [2022-01-28 15:00:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.3058186738836266) internal successors, (2443), 739 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2443 transitions. [2022-01-28 15:00:50,957 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2443 transitions. Word has length 21 [2022-01-28 15:00:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:50,957 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2443 transitions. [2022-01-28 15:00:50,957 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) [2022-01-28 15:00:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2443 transitions. [2022-01-28 15:00:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:50,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:50,958 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] [2022-01-28 15:00:50,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:51,158 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 [2022-01-28 15:00:51,159 INFO L402 AbstractCegarLoop]: === Iteration 586 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:51,159 INFO L85 PathProgramCache]: Analyzing trace with hash 561503984, now seen corresponding path program 574 times [2022-01-28 15:00:51,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:51,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526662382] [2022-01-28 15:00:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:51,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:51,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526662382] [2022-01-28 15:00:51,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526662382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:51,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789021322] [2022-01-28 15:00:51,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:51,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:51,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:51,289 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) [2022-01-28 15:00:51,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Waiting until timeout for monitored process [2022-01-28 15:00:51,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:51,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:51,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:51,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:51,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:51,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:51,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:51,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:51,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:51,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:51,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:51,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:51,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:51,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:51,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:51,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:51,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789021322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:51,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:51,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:51,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745199870] [2022-01-28 15:00:51,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:51,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:51,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:51,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:51,781 INFO L87 Difference]: Start difference. First operand 740 states and 2443 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) [2022-01-28 15:00:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:52,143 INFO L93 Difference]: Finished difference Result 1046 states and 3331 transitions. [2022-01-28 15:00:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:00:52,143 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 [2022-01-28 15:00:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:52,145 INFO L225 Difference]: With dead ends: 1046 [2022-01-28 15:00:52,145 INFO L226 Difference]: Without dead ends: 1019 [2022-01-28 15:00:52,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:52,145 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:52,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 606 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-01-28 15:00:52,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-01-28 15:00:52,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 742. [2022-01-28 15:00:52,153 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) [2022-01-28 15:00:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2448 transitions. [2022-01-28 15:00:52,154 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2448 transitions. Word has length 21 [2022-01-28 15:00:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:52,154 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2448 transitions. [2022-01-28 15:00:52,154 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) [2022-01-28 15:00:52,154 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2448 transitions. [2022-01-28 15:00:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:52,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:52,155 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] [2022-01-28 15:00:52,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Ended with exit code 0 [2022-01-28 15:00:52,355 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 [2022-01-28 15:00:52,356 INFO L402 AbstractCegarLoop]: === Iteration 587 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:52,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1975612925, now seen corresponding path program 575 times [2022-01-28 15:00:52,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:52,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864429793] [2022-01-28 15:00:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:52,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:52,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:52,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864429793] [2022-01-28 15:00:52,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864429793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:52,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762851691] [2022-01-28 15:00:52,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:52,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:52,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:52,469 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) [2022-01-28 15:00:52,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Waiting until timeout for monitored process [2022-01-28 15:00:52,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:52,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:52,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:52,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:52,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:52,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:52,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:52,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:52,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:52,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:52,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:52,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:52,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:52,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:52,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:52,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762851691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:52,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:52,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:52,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426697129] [2022-01-28 15:00:52,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:52,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:52,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:52,946 INFO L87 Difference]: Start difference. First operand 742 states and 2448 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) [2022-01-28 15:00:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:53,137 INFO L93 Difference]: Finished difference Result 867 states and 2773 transitions. [2022-01-28 15:00:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:00:53,137 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 [2022-01-28 15:00:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:53,138 INFO L225 Difference]: With dead ends: 867 [2022-01-28 15:00:53,138 INFO L226 Difference]: Without dead ends: 823 [2022-01-28 15:00:53,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:53,139 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:53,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 218 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 460 Invalid, 0 Unknown, 253 Unchecked, 0.2s Time] [2022-01-28 15:00:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-28 15:00:53,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 744. [2022-01-28 15:00:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.304172274562584) internal successors, (2455), 743 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) [2022-01-28 15:00:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2455 transitions. [2022-01-28 15:00:53,146 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2455 transitions. Word has length 21 [2022-01-28 15:00:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:53,146 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2455 transitions. [2022-01-28 15:00:53,147 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) [2022-01-28 15:00:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2455 transitions. [2022-01-28 15:00:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:53,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:53,147 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:53,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Ended with exit code 0 [2022-01-28 15:00:53,348 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 [2022-01-28 15:00:53,348 INFO L402 AbstractCegarLoop]: === Iteration 588 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1157609900, now seen corresponding path program 576 times [2022-01-28 15:00:53,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:53,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118500599] [2022-01-28 15:00:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:53,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:53,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:53,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118500599] [2022-01-28 15:00:53,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118500599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:53,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255495177] [2022-01-28 15:00:53,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:00:53,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:53,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:53,478 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) [2022-01-28 15:00:53,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Waiting until timeout for monitored process [2022-01-28 15:00:53,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:00:53,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:53,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:53,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:53,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:53,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:53,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:53,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:53,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:53,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:53,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:53,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:53,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:53,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:53,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:53,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:53,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:53,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255495177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:53,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:53,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:53,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125654585] [2022-01-28 15:00:53,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:53,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:53,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:53,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:53,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:53,964 INFO L87 Difference]: Start difference. First operand 744 states and 2455 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) [2022-01-28 15:00:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:54,463 INFO L93 Difference]: Finished difference Result 1050 states and 3330 transitions. [2022-01-28 15:00:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:00:54,463 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 [2022-01-28 15:00:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:54,465 INFO L225 Difference]: With dead ends: 1050 [2022-01-28 15:00:54,465 INFO L226 Difference]: Without dead ends: 1027 [2022-01-28 15:00:54,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:00:54,465 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:54,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 239 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 718 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-01-28 15:00:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-01-28 15:00:54,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 742. [2022-01-28 15:00:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3063427800269904) internal successors, (2450), 741 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2450 transitions. [2022-01-28 15:00:54,474 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2450 transitions. Word has length 21 [2022-01-28 15:00:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:54,474 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2450 transitions. [2022-01-28 15:00:54,474 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) [2022-01-28 15:00:54,474 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2450 transitions. [2022-01-28 15:00:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:54,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:54,475 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:54,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Ended with exit code 0 [2022-01-28 15:00:54,675 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 [2022-01-28 15:00:54,676 INFO L402 AbstractCegarLoop]: === Iteration 589 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1140989895, now seen corresponding path program 577 times [2022-01-28 15:00:54,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:54,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503138693] [2022-01-28 15:00:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:54,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:54,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:54,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503138693] [2022-01-28 15:00:54,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503138693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:54,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894376452] [2022-01-28 15:00:54,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:00:54,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:54,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:54,791 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) [2022-01-28 15:00:54,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Waiting until timeout for monitored process [2022-01-28 15:00:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:54,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:54,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:54,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:55,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:55,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:55,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:55,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:55,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:55,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:55,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:55,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:55,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:00:55,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:55,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:00:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:55,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894376452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:55,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:55,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:00:55,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373897461] [2022-01-28 15:00:55,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:55,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:00:55,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:00:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:55,246 INFO L87 Difference]: Start difference. First operand 742 states and 2450 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) [2022-01-28 15:00:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:55,452 INFO L93 Difference]: Finished difference Result 825 states and 2672 transitions. [2022-01-28 15:00:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:00:55,453 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 [2022-01-28 15:00:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:55,454 INFO L225 Difference]: With dead ends: 825 [2022-01-28 15:00:55,454 INFO L226 Difference]: Without dead ends: 796 [2022-01-28 15:00:55,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:00:55,454 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:55,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 181 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 542 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-01-28 15:00:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-01-28 15:00:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 742. [2022-01-28 15:00:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3063427800269904) internal successors, (2450), 741 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:00:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2450 transitions. [2022-01-28 15:00:55,462 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2450 transitions. Word has length 21 [2022-01-28 15:00:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:55,462 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2450 transitions. [2022-01-28 15:00:55,462 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) [2022-01-28 15:00:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2450 transitions. [2022-01-28 15:00:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:55,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:55,463 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] [2022-01-28 15:00:55,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Ended with exit code 0 [2022-01-28 15:00:55,663 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 [2022-01-28 15:00:55,663 INFO L402 AbstractCegarLoop]: === Iteration 590 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:55,664 INFO L85 PathProgramCache]: Analyzing trace with hash 258931213, now seen corresponding path program 578 times [2022-01-28 15:00:55,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:55,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283923319] [2022-01-28 15:00:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:55,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:55,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:55,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283923319] [2022-01-28 15:00:55,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283923319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:55,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949507801] [2022-01-28 15:00:55,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:00:55,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:55,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:55,772 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) [2022-01-28 15:00:55,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Waiting until timeout for monitored process [2022-01-28 15:00:55,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:55,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:55,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:55,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:55,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:55,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:55,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:55,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:55,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:56,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:56,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:56,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:56,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:56,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:56,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:56,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:56,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949507801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:56,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:56,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:00:56,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441329622] [2022-01-28 15:00:56,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:56,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:00:56,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:00:56,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:00:56,252 INFO L87 Difference]: Start difference. First operand 742 states and 2450 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) [2022-01-28 15:00:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:56,476 INFO L93 Difference]: Finished difference Result 998 states and 3228 transitions. [2022-01-28 15:00:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:00:56,476 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 [2022-01-28 15:00:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:56,478 INFO L225 Difference]: With dead ends: 998 [2022-01-28 15:00:56,478 INFO L226 Difference]: Without dead ends: 977 [2022-01-28 15:00:56,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:00:56,478 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:56,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 190 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 405 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-01-28 15:00:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-01-28 15:00:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 745. [2022-01-28 15:00:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3091397849462365) internal successors, (2462), 744 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) [2022-01-28 15:00:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2462 transitions. [2022-01-28 15:00:56,487 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2462 transitions. Word has length 21 [2022-01-28 15:00:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:56,487 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2462 transitions. [2022-01-28 15:00:56,487 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) [2022-01-28 15:00:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2462 transitions. [2022-01-28 15:00:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:56,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:56,488 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:00:56,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Ended with exit code 0 [2022-01-28 15:00:56,688 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 [2022-01-28 15:00:56,689 INFO L402 AbstractCegarLoop]: === Iteration 591 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:56,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:56,689 INFO L85 PathProgramCache]: Analyzing trace with hash -517953043, now seen corresponding path program 579 times [2022-01-28 15:00:56,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:56,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623877492] [2022-01-28 15:00:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:56,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:56,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623877492] [2022-01-28 15:00:56,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623877492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970489923] [2022-01-28 15:00:56,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:00:56,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:56,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:56,830 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) [2022-01-28 15:00:56,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Waiting until timeout for monitored process [2022-01-28 15:00:56,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:00:56,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:56,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:56,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:56,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:56,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:57,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:57,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:57,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:57,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:57,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:57,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:57,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:57,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:57,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:57,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:57,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:57,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970489923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:57,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:57,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:57,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212293349] [2022-01-28 15:00:57,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:57,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:57,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:57,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:57,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:57,342 INFO L87 Difference]: Start difference. First operand 745 states and 2462 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) [2022-01-28 15:00:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:57,755 INFO L93 Difference]: Finished difference Result 1008 states and 3242 transitions. [2022-01-28 15:00:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:00:57,755 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 [2022-01-28 15:00:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:57,757 INFO L225 Difference]: With dead ends: 1008 [2022-01-28 15:00:57,757 INFO L226 Difference]: Without dead ends: 987 [2022-01-28 15:00:57,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:00:57,757 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:57,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 241 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 728 Invalid, 0 Unknown, 144 Unchecked, 0.3s Time] [2022-01-28 15:00:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-01-28 15:00:57,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 745. [2022-01-28 15:00:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3091397849462365) internal successors, (2462), 744 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) [2022-01-28 15:00:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2462 transitions. [2022-01-28 15:00:57,766 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2462 transitions. Word has length 21 [2022-01-28 15:00:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:57,766 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2462 transitions. [2022-01-28 15:00:57,767 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) [2022-01-28 15:00:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2462 transitions. [2022-01-28 15:00:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:57,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:57,768 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] [2022-01-28 15:00:57,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Forceful destruction successful, exit code 0 [2022-01-28 15:00:57,968 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 [2022-01-28 15:00:57,968 INFO L402 AbstractCegarLoop]: === Iteration 592 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:57,968 INFO L85 PathProgramCache]: Analyzing trace with hash 855037129, now seen corresponding path program 580 times [2022-01-28 15:00:57,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:57,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917988372] [2022-01-28 15:00:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:57,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:58,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:58,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917988372] [2022-01-28 15:00:58,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917988372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:58,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310673324] [2022-01-28 15:00:58,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:00:58,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:58,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:58,109 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) [2022-01-28 15:00:58,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Waiting until timeout for monitored process [2022-01-28 15:00:58,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:00:58,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:58,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:58,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:58,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:58,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:58,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:58,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:58,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:58,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:58,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:58,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:58,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:58,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:58,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:58,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:58,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310673324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:58,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:58,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:58,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851133878] [2022-01-28 15:00:58,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:58,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:58,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:58,600 INFO L87 Difference]: Start difference. First operand 745 states and 2462 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) [2022-01-28 15:00:58,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:00:58,969 INFO L93 Difference]: Finished difference Result 991 states and 3195 transitions. [2022-01-28 15:00:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:00:58,969 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 [2022-01-28 15:00:58,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:00:58,971 INFO L225 Difference]: With dead ends: 991 [2022-01-28 15:00:58,971 INFO L226 Difference]: Without dead ends: 970 [2022-01-28 15:00:58,971 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 [2022-01-28 15:00:58,971 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:00:58,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 184 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 619 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-01-28 15:00:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-01-28 15:00:58,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 745. [2022-01-28 15:00:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3091397849462365) internal successors, (2462), 744 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) [2022-01-28 15:00:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2462 transitions. [2022-01-28 15:00:58,980 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2462 transitions. Word has length 21 [2022-01-28 15:00:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:00:58,980 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2462 transitions. [2022-01-28 15:00:58,980 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) [2022-01-28 15:00:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2462 transitions. [2022-01-28 15:00:58,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:00:58,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:00:58,981 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] [2022-01-28 15:00:58,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Ended with exit code 0 [2022-01-28 15:00:59,181 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 [2022-01-28 15:00:59,182 INFO L402 AbstractCegarLoop]: === Iteration 593 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:00:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:00:59,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1925368979, now seen corresponding path program 581 times [2022-01-28 15:00:59,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:00:59,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865265567] [2022-01-28 15:00:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:00:59,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:00:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:00:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:59,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:00:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865265567] [2022-01-28 15:00:59,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865265567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:00:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125460110] [2022-01-28 15:00:59,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:00:59,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:00:59,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:00:59,322 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) [2022-01-28 15:00:59,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Waiting until timeout for monitored process [2022-01-28 15:00:59,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:00:59,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:00:59,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:00:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:00:59,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:59,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:59,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:59,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:00:59,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:00:59,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:59,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:00:59,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:59,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:00:59,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:59,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:00:59,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:00:59,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:00:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:00:59,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125460110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:00:59,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:00:59,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:00:59,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721731232] [2022-01-28 15:00:59,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:00:59,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:00:59,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:00:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:00:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:00:59,832 INFO L87 Difference]: Start difference. First operand 745 states and 2462 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) [2022-01-28 15:01:00,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:00,218 INFO L93 Difference]: Finished difference Result 1051 states and 3375 transitions. [2022-01-28 15:01:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:01:00,218 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 [2022-01-28 15:01:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:00,220 INFO L225 Difference]: With dead ends: 1051 [2022-01-28 15:01:00,220 INFO L226 Difference]: Without dead ends: 1036 [2022-01-28 15:01:00,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:01:00,220 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:00,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 206 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 506 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-01-28 15:01:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-01-28 15:01:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 745. [2022-01-28 15:01:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3091397849462365) internal successors, (2462), 744 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) [2022-01-28 15:01:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2462 transitions. [2022-01-28 15:01:00,230 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2462 transitions. Word has length 21 [2022-01-28 15:01:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:00,230 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2462 transitions. [2022-01-28 15:01:00,230 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) [2022-01-28 15:01:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2462 transitions. [2022-01-28 15:01:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:00,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:00,231 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:00,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Ended with exit code 0 [2022-01-28 15:01:00,431 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 [2022-01-28 15:01:00,431 INFO L402 AbstractCegarLoop]: === Iteration 594 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash -659620486, now seen corresponding path program 582 times [2022-01-28 15:01:00,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:00,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085386487] [2022-01-28 15:01:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:00,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:00,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:00,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085386487] [2022-01-28 15:01:00,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085386487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:00,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826134141] [2022-01-28 15:01:00,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:00,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:00,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:00,564 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) [2022-01-28 15:01:00,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Waiting until timeout for monitored process [2022-01-28 15:01:00,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:01:00,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:00,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:00,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:00,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:00,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:00,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:00,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:00,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:00,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:00,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:01,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:01,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:01,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:01,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:01,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826134141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:01,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:01,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:01,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600470077] [2022-01-28 15:01:01,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:01,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:01,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:01,086 INFO L87 Difference]: Start difference. First operand 745 states and 2462 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) [2022-01-28 15:01:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:01,507 INFO L93 Difference]: Finished difference Result 958 states and 3094 transitions. [2022-01-28 15:01:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:01,508 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 [2022-01-28 15:01:01,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:01,509 INFO L225 Difference]: With dead ends: 958 [2022-01-28 15:01:01,509 INFO L226 Difference]: Without dead ends: 935 [2022-01-28 15:01:01,509 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 [2022-01-28 15:01:01,509 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:01,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 233 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 777 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2022-01-28 15:01:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-01-28 15:01:01,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 746. [2022-01-28 15:01:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.3114093959731545) internal successors, (2467), 745 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2467 transitions. [2022-01-28 15:01:01,518 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2467 transitions. Word has length 21 [2022-01-28 15:01:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:01,518 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2467 transitions. [2022-01-28 15:01:01,518 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) [2022-01-28 15:01:01,518 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2467 transitions. [2022-01-28 15:01:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:01,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:01,519 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:01,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Ended with exit code 0 [2022-01-28 15:01:01,719 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 [2022-01-28 15:01:01,720 INFO L402 AbstractCegarLoop]: === Iteration 595 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash -56379489, now seen corresponding path program 583 times [2022-01-28 15:01:01,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430315687] [2022-01-28 15:01:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:01,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:01,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430315687] [2022-01-28 15:01:01,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430315687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768480939] [2022-01-28 15:01:01,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:01,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:01,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:01,838 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) [2022-01-28 15:01:01,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Waiting until timeout for monitored process [2022-01-28 15:01:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:01,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:01,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:01,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:02,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:02,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:02,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:02,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:02,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:02,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:02,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:02,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:02,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:02,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:02,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:02,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768480939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:02,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:02,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:02,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64792594] [2022-01-28 15:01:02,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:02,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:02,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:02,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:02,437 INFO L87 Difference]: Start difference. First operand 746 states and 2467 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) [2022-01-28 15:01:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:02,822 INFO L93 Difference]: Finished difference Result 962 states and 3109 transitions. [2022-01-28 15:01:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:02,822 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 [2022-01-28 15:01:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:02,824 INFO L225 Difference]: With dead ends: 962 [2022-01-28 15:01:02,824 INFO L226 Difference]: Without dead ends: 935 [2022-01-28 15:01:02,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:01:02,824 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:02,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 212 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 720 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-01-28 15:01:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-01-28 15:01:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 747. [2022-01-28 15:01:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.3150134048257374) internal successors, (2473), 746 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2473 transitions. [2022-01-28 15:01:02,833 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2473 transitions. Word has length 21 [2022-01-28 15:01:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:02,833 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2473 transitions. [2022-01-28 15:01:02,833 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) [2022-01-28 15:01:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2473 transitions. [2022-01-28 15:01:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:02,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:02,834 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:02,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Ended with exit code 0 [2022-01-28 15:01:03,034 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 [2022-01-28 15:01:03,034 INFO L402 AbstractCegarLoop]: === Iteration 596 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:03,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1098229901, now seen corresponding path program 584 times [2022-01-28 15:01:03,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:03,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972672034] [2022-01-28 15:01:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:03,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:03,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:03,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972672034] [2022-01-28 15:01:03,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972672034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:03,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54844132] [2022-01-28 15:01:03,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:03,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:03,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:03,144 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) [2022-01-28 15:01:03,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Waiting until timeout for monitored process [2022-01-28 15:01:03,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:03,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:03,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:03,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:03,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:03,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:03,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:03,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:03,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:03,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:03,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:03,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:03,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:03,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:03,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:03,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:03,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:03,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54844132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:03,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:03,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 15:01:03,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757078675] [2022-01-28 15:01:03,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:03,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:01:03,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:03,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:01:03,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:01:03,534 INFO L87 Difference]: Start difference. First operand 747 states and 2473 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) [2022-01-28 15:01:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:03,719 INFO L93 Difference]: Finished difference Result 819 states and 2676 transitions. [2022-01-28 15:01:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:01:03,720 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 [2022-01-28 15:01:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:03,721 INFO L225 Difference]: With dead ends: 819 [2022-01-28 15:01:03,721 INFO L226 Difference]: Without dead ends: 790 [2022-01-28 15:01:03,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:01:03,723 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:03,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 135 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 503 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-01-28 15:01:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-28 15:01:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 746. [2022-01-28 15:01:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.3114093959731545) internal successors, (2467), 745 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2467 transitions. [2022-01-28 15:01:03,734 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2467 transitions. Word has length 21 [2022-01-28 15:01:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:03,734 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2467 transitions. [2022-01-28 15:01:03,734 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) [2022-01-28 15:01:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2467 transitions. [2022-01-28 15:01:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:03,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:03,735 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] [2022-01-28 15:01:03,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:03,951 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 [2022-01-28 15:01:03,951 INFO L402 AbstractCegarLoop]: === Iteration 597 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash -556110332, now seen corresponding path program 585 times [2022-01-28 15:01:03,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:03,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292695166] [2022-01-28 15:01:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:03,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:04,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292695166] [2022-01-28 15:01:04,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292695166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993866728] [2022-01-28 15:01:04,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:01:04,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:04,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:04,068 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) [2022-01-28 15:01:04,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Waiting until timeout for monitored process [2022-01-28 15:01:04,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:01:04,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:04,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:04,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:04,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:04,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:04,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:04,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:04,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:04,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:04,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:04,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:04,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:04,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:04,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:04,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:04,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993866728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:04,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:04,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:01:04,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69025013] [2022-01-28 15:01:04,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:04,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:04,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:04,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:04,557 INFO L87 Difference]: Start difference. First operand 746 states and 2467 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) [2022-01-28 15:01:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:04,762 INFO L93 Difference]: Finished difference Result 887 states and 2891 transitions. [2022-01-28 15:01:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:01:04,762 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 [2022-01-28 15:01:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:04,763 INFO L225 Difference]: With dead ends: 887 [2022-01-28 15:01:04,763 INFO L226 Difference]: Without dead ends: 868 [2022-01-28 15:01:04,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:04,763 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:04,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 149 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 460 Invalid, 0 Unknown, 215 Unchecked, 0.2s Time] [2022-01-28 15:01:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-28 15:01:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 750. [2022-01-28 15:01:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.315086782376502) internal successors, (2483), 749 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) [2022-01-28 15:01:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2483 transitions. [2022-01-28 15:01:04,772 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2483 transitions. Word has length 21 [2022-01-28 15:01:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:04,772 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2483 transitions. [2022-01-28 15:01:04,772 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) [2022-01-28 15:01:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2483 transitions. [2022-01-28 15:01:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:04,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:04,773 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:04,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:04,973 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 [2022-01-28 15:01:04,973 INFO L402 AbstractCegarLoop]: === Iteration 598 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1811042324, now seen corresponding path program 586 times [2022-01-28 15:01:04,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995204354] [2022-01-28 15:01:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:04,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:05,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:05,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995204354] [2022-01-28 15:01:05,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995204354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:05,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442786455] [2022-01-28 15:01:05,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:01:05,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:05,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:05,092 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) [2022-01-28 15:01:05,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Waiting until timeout for monitored process [2022-01-28 15:01:05,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:01:05,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:05,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:05,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:05,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:05,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:05,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:05,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:05,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:05,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:05,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:05,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:05,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:05,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:05,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:05,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442786455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:05,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:05,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:05,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765724050] [2022-01-28 15:01:05,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:05,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:05,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:05,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:05,723 INFO L87 Difference]: Start difference. First operand 750 states and 2483 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) [2022-01-28 15:01:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:05,941 INFO L93 Difference]: Finished difference Result 976 states and 3107 transitions. [2022-01-28 15:01:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:05,941 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 [2022-01-28 15:01:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:05,942 INFO L225 Difference]: With dead ends: 976 [2022-01-28 15:01:05,942 INFO L226 Difference]: Without dead ends: 938 [2022-01-28 15:01:05,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:01:05,943 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:05,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 222 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 452 Invalid, 0 Unknown, 265 Unchecked, 0.2s Time] [2022-01-28 15:01:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-01-28 15:01:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 758. [2022-01-28 15:01:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.3077939233817704) internal successors, (2504), 757 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) [2022-01-28 15:01:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2504 transitions. [2022-01-28 15:01:05,955 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2504 transitions. Word has length 21 [2022-01-28 15:01:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:05,955 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2504 transitions. [2022-01-28 15:01:05,956 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) [2022-01-28 15:01:05,956 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2504 transitions. [2022-01-28 15:01:05,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:05,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:05,957 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:05,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Ended with exit code 0 [2022-01-28 15:01:06,167 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 [2022-01-28 15:01:06,167 INFO L402 AbstractCegarLoop]: === Iteration 599 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1808543044, now seen corresponding path program 587 times [2022-01-28 15:01:06,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:06,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455013751] [2022-01-28 15:01:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:06,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:06,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:06,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455013751] [2022-01-28 15:01:06,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455013751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:06,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880151764] [2022-01-28 15:01:06,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:01:06,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:06,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:06,286 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) [2022-01-28 15:01:06,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Waiting until timeout for monitored process [2022-01-28 15:01:06,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:01:06,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:06,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:06,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:06,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:06,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:06,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:06,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:06,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:06,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:06,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:06,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:06,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:06,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:06,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:06,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:06,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880151764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:06,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:06,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:06,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985924197] [2022-01-28 15:01:06,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:06,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:06,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:06,942 INFO L87 Difference]: Start difference. First operand 758 states and 2504 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) [2022-01-28 15:01:07,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:07,160 INFO L93 Difference]: Finished difference Result 936 states and 2994 transitions. [2022-01-28 15:01:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:07,161 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 [2022-01-28 15:01:07,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:07,162 INFO L225 Difference]: With dead ends: 936 [2022-01-28 15:01:07,162 INFO L226 Difference]: Without dead ends: 930 [2022-01-28 15:01:07,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:01:07,163 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:07,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 170 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 433 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-01-28 15:01:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-01-28 15:01:07,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 746. [2022-01-28 15:01:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.3114093959731545) internal successors, (2467), 745 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2467 transitions. [2022-01-28 15:01:07,173 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2467 transitions. Word has length 21 [2022-01-28 15:01:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:07,173 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2467 transitions. [2022-01-28 15:01:07,173 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) [2022-01-28 15:01:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2467 transitions. [2022-01-28 15:01:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:07,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:07,174 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:07,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Ended with exit code 0 [2022-01-28 15:01:07,375 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 [2022-01-28 15:01:07,375 INFO L402 AbstractCegarLoop]: === Iteration 600 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash -49758837, now seen corresponding path program 588 times [2022-01-28 15:01:07,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:07,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616777355] [2022-01-28 15:01:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:07,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:07,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616777355] [2022-01-28 15:01:07,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616777355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:07,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064992508] [2022-01-28 15:01:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:07,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:07,492 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) [2022-01-28 15:01:07,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Waiting until timeout for monitored process [2022-01-28 15:01:07,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:01:07,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:07,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:07,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:07,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:07,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:07,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:07,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:07,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:07,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:08,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:08,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:08,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:08,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:08,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:08,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:08,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064992508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:08,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:08,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:01:08,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806150259] [2022-01-28 15:01:08,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:08,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:08,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:08,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:08,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:08,162 INFO L87 Difference]: Start difference. First operand 746 states and 2467 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) [2022-01-28 15:01:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:08,455 INFO L93 Difference]: Finished difference Result 1001 states and 3222 transitions. [2022-01-28 15:01:08,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:01:08,455 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 [2022-01-28 15:01:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:08,457 INFO L225 Difference]: With dead ends: 1001 [2022-01-28 15:01:08,457 INFO L226 Difference]: Without dead ends: 974 [2022-01-28 15:01:08,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:01:08,457 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:08,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 239 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 593 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-01-28 15:01:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-01-28 15:01:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 749. [2022-01-28 15:01:08,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3155080213903743) internal successors, (2480), 748 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2480 transitions. [2022-01-28 15:01:08,466 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2480 transitions. Word has length 21 [2022-01-28 15:01:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:08,466 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2480 transitions. [2022-01-28 15:01:08,467 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) [2022-01-28 15:01:08,467 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2480 transitions. [2022-01-28 15:01:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:08,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:08,468 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] [2022-01-28 15:01:08,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Ended with exit code 0 [2022-01-28 15:01:08,668 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 [2022-01-28 15:01:08,668 INFO L402 AbstractCegarLoop]: === Iteration 601 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:08,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1340658671, now seen corresponding path program 589 times [2022-01-28 15:01:08,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:08,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260004803] [2022-01-28 15:01:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:08,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:08,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:08,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260004803] [2022-01-28 15:01:08,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260004803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:08,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427488186] [2022-01-28 15:01:08,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:08,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:08,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:08,777 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) [2022-01-28 15:01:08,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Waiting until timeout for monitored process [2022-01-28 15:01:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:08,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:08,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:08,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:09,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:09,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:09,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:09,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:09,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:09,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:09,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:09,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:09,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:09,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:09,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:09,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427488186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:09,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:09,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:01:09,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526150900] [2022-01-28 15:01:09,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:09,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:09,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:09,227 INFO L87 Difference]: Start difference. First operand 749 states and 2480 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) [2022-01-28 15:01:09,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:09,436 INFO L93 Difference]: Finished difference Result 845 states and 2748 transitions. [2022-01-28 15:01:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:01:09,436 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 [2022-01-28 15:01:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:09,438 INFO L225 Difference]: With dead ends: 845 [2022-01-28 15:01:09,438 INFO L226 Difference]: Without dead ends: 816 [2022-01-28 15:01:09,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:09,438 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:09,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 208 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 559 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-01-28 15:01:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-28 15:01:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 751. [2022-01-28 15:01:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3173333333333335) internal successors, (2488), 750 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) [2022-01-28 15:01:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2488 transitions. [2022-01-28 15:01:09,446 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2488 transitions. Word has length 21 [2022-01-28 15:01:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:09,446 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2488 transitions. [2022-01-28 15:01:09,446 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) [2022-01-28 15:01:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2488 transitions. [2022-01-28 15:01:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:09,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:09,447 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:09,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:09,647 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 [2022-01-28 15:01:09,647 INFO L402 AbstractCegarLoop]: === Iteration 602 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:09,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1319080055, now seen corresponding path program 590 times [2022-01-28 15:01:09,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:09,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144198359] [2022-01-28 15:01:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:09,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:09,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144198359] [2022-01-28 15:01:09,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144198359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620526985] [2022-01-28 15:01:09,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:09,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:09,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:09,761 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) [2022-01-28 15:01:09,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Waiting until timeout for monitored process [2022-01-28 15:01:09,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:09,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:09,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:09,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:09,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:09,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:10,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:10,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:10,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:10,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:10,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:10,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:10,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:10,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:10,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:10,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:10,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:10,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620526985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:10,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:10,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:01:10,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842199812] [2022-01-28 15:01:10,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:10,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:10,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:10,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:10,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:10,521 INFO L87 Difference]: Start difference. First operand 751 states and 2488 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) [2022-01-28 15:01:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:10,853 INFO L93 Difference]: Finished difference Result 999 states and 3196 transitions. [2022-01-28 15:01:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:01:10,854 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 [2022-01-28 15:01:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:10,855 INFO L225 Difference]: With dead ends: 999 [2022-01-28 15:01:10,855 INFO L226 Difference]: Without dead ends: 972 [2022-01-28 15:01:10,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:01:10,855 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:10,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 181 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 569 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-01-28 15:01:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-01-28 15:01:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 749. [2022-01-28 15:01:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3128342245989306) internal successors, (2478), 748 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) [2022-01-28 15:01:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2478 transitions. [2022-01-28 15:01:10,864 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2478 transitions. Word has length 21 [2022-01-28 15:01:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:10,864 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2478 transitions. [2022-01-28 15:01:10,864 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) [2022-01-28 15:01:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2478 transitions. [2022-01-28 15:01:10,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:10,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:10,865 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:10,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:11,065 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 [2022-01-28 15:01:11,066 INFO L402 AbstractCegarLoop]: === Iteration 603 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2120330513, now seen corresponding path program 591 times [2022-01-28 15:01:11,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:11,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352208042] [2022-01-28 15:01:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:11,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:11,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:11,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352208042] [2022-01-28 15:01:11,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352208042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:11,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235282931] [2022-01-28 15:01:11,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:01:11,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:11,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:11,178 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) [2022-01-28 15:01:11,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Waiting until timeout for monitored process [2022-01-28 15:01:11,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:01:11,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:11,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:11,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:11,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:11,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:11,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:11,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:11,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:11,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:11,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:11,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:11,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:11,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:11,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:11,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:11,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235282931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:11,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:11,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:01:11,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468143046] [2022-01-28 15:01:11,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:11,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:11,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:11,664 INFO L87 Difference]: Start difference. First operand 749 states and 2478 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) [2022-01-28 15:01:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:11,905 INFO L93 Difference]: Finished difference Result 822 states and 2671 transitions. [2022-01-28 15:01:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:01:11,906 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 [2022-01-28 15:01:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:11,907 INFO L225 Difference]: With dead ends: 822 [2022-01-28 15:01:11,907 INFO L226 Difference]: Without dead ends: 809 [2022-01-28 15:01:11,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:11,907 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:11,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 189 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 554 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2022-01-28 15:01:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-28 15:01:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 749. [2022-01-28 15:01:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3128342245989306) internal successors, (2478), 748 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) [2022-01-28 15:01:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2478 transitions. [2022-01-28 15:01:11,915 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2478 transitions. Word has length 21 [2022-01-28 15:01:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:11,915 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2478 transitions. [2022-01-28 15:01:11,915 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) [2022-01-28 15:01:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2478 transitions. [2022-01-28 15:01:11,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:11,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:11,916 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] [2022-01-28 15:01:11,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Ended with exit code 0 [2022-01-28 15:01:12,116 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 [2022-01-28 15:01:12,117 INFO L402 AbstractCegarLoop]: === Iteration 604 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1052491379, now seen corresponding path program 592 times [2022-01-28 15:01:12,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:12,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921608430] [2022-01-28 15:01:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:12,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:12,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:12,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921608430] [2022-01-28 15:01:12,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921608430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:12,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820702294] [2022-01-28 15:01:12,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:01:12,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:12,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:12,222 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) [2022-01-28 15:01:12,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Waiting until timeout for monitored process [2022-01-28 15:01:12,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:01:12,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:12,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:12,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:12,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:12,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:12,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:12,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:12,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:12,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:12,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:12,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:12,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:12,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:12,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:12,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820702294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:12,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:12,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:01:12,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932494624] [2022-01-28 15:01:12,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:12,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:12,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:12,744 INFO L87 Difference]: Start difference. First operand 749 states and 2478 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) [2022-01-28 15:01:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:12,933 INFO L93 Difference]: Finished difference Result 889 states and 2833 transitions. [2022-01-28 15:01:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:12,934 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 [2022-01-28 15:01:12,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:12,935 INFO L225 Difference]: With dead ends: 889 [2022-01-28 15:01:12,935 INFO L226 Difference]: Without dead ends: 831 [2022-01-28 15:01:12,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:12,935 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:12,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 199 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 503 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-01-28 15:01:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-28 15:01:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 757. [2022-01-28 15:01:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.2976190476190474) internal successors, (2493), 756 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2493 transitions. [2022-01-28 15:01:12,943 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2493 transitions. Word has length 21 [2022-01-28 15:01:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:12,943 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2493 transitions. [2022-01-28 15:01:12,943 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) [2022-01-28 15:01:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2493 transitions. [2022-01-28 15:01:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:12,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:12,944 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:12,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:13,144 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 [2022-01-28 15:01:13,145 INFO L402 AbstractCegarLoop]: === Iteration 605 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash -559188211, now seen corresponding path program 593 times [2022-01-28 15:01:13,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:13,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261748505] [2022-01-28 15:01:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:13,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:13,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:13,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261748505] [2022-01-28 15:01:13,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261748505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:13,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217401837] [2022-01-28 15:01:13,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:01:13,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:13,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:13,289 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) [2022-01-28 15:01:13,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Waiting until timeout for monitored process [2022-01-28 15:01:13,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:01:13,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:13,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:13,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:13,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:13,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:13,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:13,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:13,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:13,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:13,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:13,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:13,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:13,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:13,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:13,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:13,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:13,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217401837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:13,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:13,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:01:13,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350897288] [2022-01-28 15:01:13,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:13,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:13,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:13,923 INFO L87 Difference]: Start difference. First operand 757 states and 2493 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) [2022-01-28 15:01:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:14,110 INFO L93 Difference]: Finished difference Result 843 states and 2703 transitions. [2022-01-28 15:01:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:14,110 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 [2022-01-28 15:01:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:14,111 INFO L225 Difference]: With dead ends: 843 [2022-01-28 15:01:14,111 INFO L226 Difference]: Without dead ends: 819 [2022-01-28 15:01:14,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:14,111 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:14,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 193 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 506 Invalid, 0 Unknown, 190 Unchecked, 0.2s Time] [2022-01-28 15:01:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-01-28 15:01:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 749. [2022-01-28 15:01:14,118 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) [2022-01-28 15:01:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2475 transitions. [2022-01-28 15:01:14,119 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2475 transitions. Word has length 21 [2022-01-28 15:01:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:14,119 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2475 transitions. [2022-01-28 15:01:14,119 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) [2022-01-28 15:01:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2475 transitions. [2022-01-28 15:01:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:14,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:14,120 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] [2022-01-28 15:01:14,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Ended with exit code 0 [2022-01-28 15:01:14,321 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 [2022-01-28 15:01:14,321 INFO L402 AbstractCegarLoop]: === Iteration 606 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1388582763, now seen corresponding path program 594 times [2022-01-28 15:01:14,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:14,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207097789] [2022-01-28 15:01:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:14,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:14,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207097789] [2022-01-28 15:01:14,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207097789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007961068] [2022-01-28 15:01:14,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:14,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:14,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:14,445 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) [2022-01-28 15:01:14,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Waiting until timeout for monitored process [2022-01-28 15:01:14,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:01:14,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:14,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:14,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:14,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:14,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:14,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:14,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:14,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:15,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:15,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:15,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:15,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:15,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:15,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:15,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007961068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:15,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:15,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:15,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209355083] [2022-01-28 15:01:15,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:15,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:15,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:15,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:15,217 INFO L87 Difference]: Start difference. First operand 749 states and 2475 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) [2022-01-28 15:01:15,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:15,541 INFO L93 Difference]: Finished difference Result 1016 states and 3235 transitions. [2022-01-28 15:01:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:01:15,542 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 [2022-01-28 15:01:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:15,543 INFO L225 Difference]: With dead ends: 1016 [2022-01-28 15:01:15,543 INFO L226 Difference]: Without dead ends: 974 [2022-01-28 15:01:15,543 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 [2022-01-28 15:01:15,543 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:15,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 274 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 668 Invalid, 0 Unknown, 362 Unchecked, 0.2s Time] [2022-01-28 15:01:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-01-28 15:01:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 755. [2022-01-28 15:01:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.316976127320955) internal successors, (2501), 754 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) [2022-01-28 15:01:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2501 transitions. [2022-01-28 15:01:15,552 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2501 transitions. Word has length 21 [2022-01-28 15:01:15,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:15,552 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2501 transitions. [2022-01-28 15:01:15,552 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) [2022-01-28 15:01:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2501 transitions. [2022-01-28 15:01:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:15,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:15,553 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:15,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Ended with exit code 0 [2022-01-28 15:01:15,754 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 [2022-01-28 15:01:15,754 INFO L402 AbstractCegarLoop]: === Iteration 607 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:15,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:15,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1720552596, now seen corresponding path program 595 times [2022-01-28 15:01:15,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:15,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421389034] [2022-01-28 15:01:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:15,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:15,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:15,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421389034] [2022-01-28 15:01:15,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421389034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:15,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488886721] [2022-01-28 15:01:15,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:15,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:15,866 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) [2022-01-28 15:01:15,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Waiting until timeout for monitored process [2022-01-28 15:01:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:15,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:15,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:15,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:15,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:16,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:16,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:16,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:16,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:16,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:16,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:16,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:16,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:16,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:16,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:16,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:16,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488886721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:16,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:16,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:16,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807420830] [2022-01-28 15:01:16,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:16,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:16,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:16,453 INFO L87 Difference]: Start difference. First operand 755 states and 2501 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) [2022-01-28 15:01:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:16,836 INFO L93 Difference]: Finished difference Result 949 states and 3063 transitions. [2022-01-28 15:01:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:16,837 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 [2022-01-28 15:01:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:16,838 INFO L225 Difference]: With dead ends: 949 [2022-01-28 15:01:16,838 INFO L226 Difference]: Without dead ends: 926 [2022-01-28 15:01:16,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:01:16,839 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:16,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 253 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 787 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2022-01-28 15:01:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-28 15:01:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 757. [2022-01-28 15:01:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.314814814814815) internal successors, (2506), 756 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2506 transitions. [2022-01-28 15:01:16,847 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2506 transitions. Word has length 21 [2022-01-28 15:01:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:16,847 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2506 transitions. [2022-01-28 15:01:16,847 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) [2022-01-28 15:01:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2506 transitions. [2022-01-28 15:01:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:16,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:16,848 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] [2022-01-28 15:01:16,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Ended with exit code 0 [2022-01-28 15:01:17,049 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 [2022-01-28 15:01:17,049 INFO L402 AbstractCegarLoop]: === Iteration 608 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:17,049 INFO L85 PathProgramCache]: Analyzing trace with hash -885929566, now seen corresponding path program 596 times [2022-01-28 15:01:17,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:17,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904464402] [2022-01-28 15:01:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:17,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:17,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904464402] [2022-01-28 15:01:17,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904464402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591515174] [2022-01-28 15:01:17,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:17,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:17,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:17,168 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) [2022-01-28 15:01:17,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Waiting until timeout for monitored process [2022-01-28 15:01:17,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:17,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:17,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:17,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:17,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:17,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:17,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:17,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:17,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:17,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:17,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:17,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:17,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:17,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:17,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:17,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:17,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:17,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591515174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:17,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:17,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:17,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682387213] [2022-01-28 15:01:17,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:17,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:17,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:17,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:17,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:17,798 INFO L87 Difference]: Start difference. First operand 757 states and 2506 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) [2022-01-28 15:01:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:18,062 INFO L93 Difference]: Finished difference Result 943 states and 3036 transitions. [2022-01-28 15:01:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:01:18,062 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 [2022-01-28 15:01:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:18,064 INFO L225 Difference]: With dead ends: 943 [2022-01-28 15:01:18,064 INFO L226 Difference]: Without dead ends: 924 [2022-01-28 15:01:18,064 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 [2022-01-28 15:01:18,064 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:18,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 199 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 580 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-01-28 15:01:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-28 15:01:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 759. [2022-01-28 15:01:18,071 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) [2022-01-28 15:01:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2513 transitions. [2022-01-28 15:01:18,073 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2513 transitions. Word has length 21 [2022-01-28 15:01:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:18,073 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2513 transitions. [2022-01-28 15:01:18,073 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) [2022-01-28 15:01:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2513 transitions. [2022-01-28 15:01:18,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:18,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:18,074 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:18,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Ended with exit code 0 [2022-01-28 15:01:18,274 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 [2022-01-28 15:01:18,274 INFO L402 AbstractCegarLoop]: === Iteration 609 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1766368626, now seen corresponding path program 597 times [2022-01-28 15:01:18,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:18,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006632387] [2022-01-28 15:01:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:18,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:18,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006632387] [2022-01-28 15:01:18,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006632387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415508922] [2022-01-28 15:01:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:01:18,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:18,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:18,397 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) [2022-01-28 15:01:18,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Waiting until timeout for monitored process [2022-01-28 15:01:18,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:01:18,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:18,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:18,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:18,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:18,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:18,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:18,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:18,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:18,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:18,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:18,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:18,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:18,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:18,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:19,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415508922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:19,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:19,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:19,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958810273] [2022-01-28 15:01:19,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:19,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:19,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:19,023 INFO L87 Difference]: Start difference. First operand 759 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) [2022-01-28 15:01:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:19,290 INFO L93 Difference]: Finished difference Result 973 states and 3101 transitions. [2022-01-28 15:01:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:01:19,290 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 [2022-01-28 15:01:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:19,292 INFO L225 Difference]: With dead ends: 973 [2022-01-28 15:01:19,292 INFO L226 Difference]: Without dead ends: 958 [2022-01-28 15:01:19,292 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 [2022-01-28 15:01:19,292 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:19,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 210 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 574 Invalid, 0 Unknown, 198 Unchecked, 0.2s Time] [2022-01-28 15:01:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-01-28 15:01:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 755. [2022-01-28 15:01:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.316976127320955) internal successors, (2501), 754 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) [2022-01-28 15:01:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2501 transitions. [2022-01-28 15:01:19,301 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2501 transitions. Word has length 21 [2022-01-28 15:01:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:19,301 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2501 transitions. [2022-01-28 15:01:19,301 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) [2022-01-28 15:01:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2501 transitions. [2022-01-28 15:01:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:19,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:19,302 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:19,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:19,502 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 [2022-01-28 15:01:19,502 INFO L402 AbstractCegarLoop]: === Iteration 610 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:19,503 INFO L85 PathProgramCache]: Analyzing trace with hash 748034845, now seen corresponding path program 598 times [2022-01-28 15:01:19,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:19,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091331684] [2022-01-28 15:01:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:19,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:19,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091331684] [2022-01-28 15:01:19,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091331684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384546416] [2022-01-28 15:01:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:01:19,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:19,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:19,668 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) [2022-01-28 15:01:19,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Waiting until timeout for monitored process [2022-01-28 15:01:19,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:01:19,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:19,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:19,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:19,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:19,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:20,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:20,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:20,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:20,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:20,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:20,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:20,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:20,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:20,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:20,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:20,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:20,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384546416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:20,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:20,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:20,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387142372] [2022-01-28 15:01:20,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:20,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:20,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:20,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:20,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:20,316 INFO L87 Difference]: Start difference. First operand 755 states and 2501 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) [2022-01-28 15:01:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:20,557 INFO L93 Difference]: Finished difference Result 957 states and 3082 transitions. [2022-01-28 15:01:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:20,557 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 [2022-01-28 15:01:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:20,559 INFO L225 Difference]: With dead ends: 957 [2022-01-28 15:01:20,559 INFO L226 Difference]: Without dead ends: 936 [2022-01-28 15:01:20,559 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 [2022-01-28 15:01:20,559 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:20,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 160 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 435 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-01-28 15:01:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-01-28 15:01:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 753. [2022-01-28 15:01:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.315159574468085) internal successors, (2493), 752 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2493 transitions. [2022-01-28 15:01:20,569 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2493 transitions. Word has length 21 [2022-01-28 15:01:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:20,569 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2493 transitions. [2022-01-28 15:01:20,569 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) [2022-01-28 15:01:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2493 transitions. [2022-01-28 15:01:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:20,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:20,570 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:20,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Ended with exit code 0 [2022-01-28 15:01:20,770 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 [2022-01-28 15:01:20,771 INFO L402 AbstractCegarLoop]: === Iteration 611 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:20,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:20,771 INFO L85 PathProgramCache]: Analyzing trace with hash 429994335, now seen corresponding path program 599 times [2022-01-28 15:01:20,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:20,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738868320] [2022-01-28 15:01:20,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:20,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:20,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:20,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738868320] [2022-01-28 15:01:20,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738868320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:20,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109546018] [2022-01-28 15:01:20,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:01:20,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:20,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:20,891 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) [2022-01-28 15:01:20,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Waiting until timeout for monitored process [2022-01-28 15:01:20,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:01:20,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:20,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:20,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:21,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:21,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:21,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:21,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:21,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:21,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:21,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:21,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:21,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:21,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:21,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:21,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:21,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109546018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:21,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:21,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:21,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528615294] [2022-01-28 15:01:21,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:21,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:21,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:21,587 INFO L87 Difference]: Start difference. First operand 753 states and 2493 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) [2022-01-28 15:01:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:21,882 INFO L93 Difference]: Finished difference Result 959 states and 3070 transitions. [2022-01-28 15:01:21,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:21,882 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 [2022-01-28 15:01:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:21,884 INFO L225 Difference]: With dead ends: 959 [2022-01-28 15:01:21,884 INFO L226 Difference]: Without dead ends: 941 [2022-01-28 15:01:21,884 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 [2022-01-28 15:01:21,884 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:21,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 169 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 583 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-01-28 15:01:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-01-28 15:01:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 752. [2022-01-28 15:01:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.315579227696405) internal successors, (2490), 751 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2490 transitions. [2022-01-28 15:01:21,893 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2490 transitions. Word has length 21 [2022-01-28 15:01:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:21,893 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2490 transitions. [2022-01-28 15:01:21,894 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) [2022-01-28 15:01:21,894 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2490 transitions. [2022-01-28 15:01:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:21,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:21,894 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:21,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Ended with exit code 0 [2022-01-28 15:01:22,095 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 [2022-01-28 15:01:22,095 INFO L402 AbstractCegarLoop]: === Iteration 612 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:22,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1016909937, now seen corresponding path program 600 times [2022-01-28 15:01:22,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:22,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843740084] [2022-01-28 15:01:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:22,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:22,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:22,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843740084] [2022-01-28 15:01:22,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843740084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:22,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586769591] [2022-01-28 15:01:22,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:22,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:22,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:22,218 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) [2022-01-28 15:01:22,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Waiting until timeout for monitored process [2022-01-28 15:01:22,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:01:22,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:22,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:22,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:22,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:22,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:22,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:22,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:22,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:22,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:22,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:22,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:22,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:22,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:22,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:22,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:22,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:22,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586769591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:22,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:22,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:22,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603710497] [2022-01-28 15:01:22,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:22,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:22,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:22,911 INFO L87 Difference]: Start difference. First operand 752 states and 2490 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) [2022-01-28 15:01:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:23,180 INFO L93 Difference]: Finished difference Result 993 states and 3150 transitions. [2022-01-28 15:01:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:23,180 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 [2022-01-28 15:01:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:23,182 INFO L225 Difference]: With dead ends: 993 [2022-01-28 15:01:23,182 INFO L226 Difference]: Without dead ends: 963 [2022-01-28 15:01:23,182 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 [2022-01-28 15:01:23,182 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:23,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 226 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 519 Invalid, 0 Unknown, 187 Unchecked, 0.2s Time] [2022-01-28 15:01:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-01-28 15:01:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 761. [2022-01-28 15:01:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3092105263157894) internal successors, (2515), 760 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) [2022-01-28 15:01:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2515 transitions. [2022-01-28 15:01:23,191 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2515 transitions. Word has length 21 [2022-01-28 15:01:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:23,191 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2515 transitions. [2022-01-28 15:01:23,191 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) [2022-01-28 15:01:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2515 transitions. [2022-01-28 15:01:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:23,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:23,192 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] [2022-01-28 15:01:23,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Ended with exit code 0 [2022-01-28 15:01:23,392 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 [2022-01-28 15:01:23,392 INFO L402 AbstractCegarLoop]: === Iteration 613 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash -843608735, now seen corresponding path program 601 times [2022-01-28 15:01:23,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:23,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255753047] [2022-01-28 15:01:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:23,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:23,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:23,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255753047] [2022-01-28 15:01:23,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255753047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:23,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170361616] [2022-01-28 15:01:23,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:23,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:23,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:23,519 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) [2022-01-28 15:01:23,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Waiting until timeout for monitored process [2022-01-28 15:01:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:23,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:23,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:23,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:23,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:23,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:23,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:23,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:23,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:24,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:24,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:24,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:24,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:24,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:24,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:24,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:24,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170361616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:24,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:24,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:24,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61167711] [2022-01-28 15:01:24,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:24,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:24,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:24,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:24,273 INFO L87 Difference]: Start difference. First operand 761 states and 2515 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) [2022-01-28 15:01:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:24,572 INFO L93 Difference]: Finished difference Result 965 states and 3082 transitions. [2022-01-28 15:01:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:24,572 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 [2022-01-28 15:01:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:24,574 INFO L225 Difference]: With dead ends: 965 [2022-01-28 15:01:24,574 INFO L226 Difference]: Without dead ends: 959 [2022-01-28 15:01:24,574 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 [2022-01-28 15:01:24,574 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:24,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 205 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 598 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-01-28 15:01:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-01-28 15:01:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 745. [2022-01-28 15:01:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3091397849462365) internal successors, (2462), 744 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) [2022-01-28 15:01:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2462 transitions. [2022-01-28 15:01:24,583 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2462 transitions. Word has length 21 [2022-01-28 15:01:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:24,583 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2462 transitions. [2022-01-28 15:01:24,583 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) [2022-01-28 15:01:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2462 transitions. [2022-01-28 15:01:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:24,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:24,585 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:24,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:24,800 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 [2022-01-28 15:01:24,800 INFO L402 AbstractCegarLoop]: === Iteration 614 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1622282074, now seen corresponding path program 602 times [2022-01-28 15:01:24,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:24,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454017196] [2022-01-28 15:01:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:24,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:24,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:24,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454017196] [2022-01-28 15:01:24,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454017196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:24,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040360634] [2022-01-28 15:01:24,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:24,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:24,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:24,897 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) [2022-01-28 15:01:24,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Waiting until timeout for monitored process [2022-01-28 15:01:24,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:25,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:25,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:25,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:25,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:25,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:25,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:25,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:25,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:25,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:25,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:25,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:25,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:25,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:25,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040360634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:25,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:25,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:25,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992094542] [2022-01-28 15:01:25,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:25,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:25,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:25,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:25,389 INFO L87 Difference]: Start difference. First operand 745 states and 2462 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) [2022-01-28 15:01:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:25,512 INFO L93 Difference]: Finished difference Result 841 states and 2722 transitions. [2022-01-28 15:01:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:25,512 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 [2022-01-28 15:01:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:25,514 INFO L225 Difference]: With dead ends: 841 [2022-01-28 15:01:25,514 INFO L226 Difference]: Without dead ends: 814 [2022-01-28 15:01:25,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:25,514 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:25,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 153 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 289 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-01-28 15:01:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-28 15:01:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 749. [2022-01-28 15:01:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.304812834224599) internal successors, (2472), 748 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2472 transitions. [2022-01-28 15:01:25,522 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2472 transitions. Word has length 21 [2022-01-28 15:01:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:25,522 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2472 transitions. [2022-01-28 15:01:25,522 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) [2022-01-28 15:01:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2472 transitions. [2022-01-28 15:01:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:25,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:25,523 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:25,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:25,723 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 [2022-01-28 15:01:25,723 INFO L402 AbstractCegarLoop]: === Iteration 615 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:25,724 INFO L85 PathProgramCache]: Analyzing trace with hash -914834835, now seen corresponding path program 603 times [2022-01-28 15:01:25,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:25,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037642198] [2022-01-28 15:01:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:25,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:25,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037642198] [2022-01-28 15:01:25,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037642198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:25,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88739965] [2022-01-28 15:01:25,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:01:25,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:25,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:25,827 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) [2022-01-28 15:01:25,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Waiting until timeout for monitored process [2022-01-28 15:01:25,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:01:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:25,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:25,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:25,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:26,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:26,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:26,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:26,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:26,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:26,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:26,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:26,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:26,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:26,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:26,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:26,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88739965] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:26,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:26,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:01:26,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067586772] [2022-01-28 15:01:26,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:26,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:26,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:26,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:26,268 INFO L87 Difference]: Start difference. First operand 749 states and 2472 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) [2022-01-28 15:01:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:26,399 INFO L93 Difference]: Finished difference Result 822 states and 2670 transitions. [2022-01-28 15:01:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:01:26,399 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 [2022-01-28 15:01:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:26,400 INFO L225 Difference]: With dead ends: 822 [2022-01-28 15:01:26,400 INFO L226 Difference]: Without dead ends: 800 [2022-01-28 15:01:26,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:26,401 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:26,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 171 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 343 Invalid, 0 Unknown, 148 Unchecked, 0.1s Time] [2022-01-28 15:01:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-01-28 15:01:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 749. [2022-01-28 15:01:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.304812834224599) internal successors, (2472), 748 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2472 transitions. [2022-01-28 15:01:26,415 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2472 transitions. Word has length 21 [2022-01-28 15:01:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:26,415 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2472 transitions. [2022-01-28 15:01:26,415 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) [2022-01-28 15:01:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2472 transitions. [2022-01-28 15:01:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:26,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:26,416 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] [2022-01-28 15:01:26,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:26,617 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 [2022-01-28 15:01:26,617 INFO L402 AbstractCegarLoop]: === Iteration 616 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2076579306, now seen corresponding path program 604 times [2022-01-28 15:01:26,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:26,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294837653] [2022-01-28 15:01:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:26,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:26,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:26,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294837653] [2022-01-28 15:01:26,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294837653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:26,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602353251] [2022-01-28 15:01:26,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:01:26,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:26,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:26,741 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) [2022-01-28 15:01:26,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Waiting until timeout for monitored process [2022-01-28 15:01:26,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:01:26,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:26,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:26,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:26,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:26,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:26,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:26,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:26,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:27,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:27,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:27,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:27,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:27,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:27,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:27,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602353251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:27,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:27,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:27,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620827767] [2022-01-28 15:01:27,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:27,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:27,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:27,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:27,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:27,227 INFO L87 Difference]: Start difference. First operand 749 states and 2472 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) [2022-01-28 15:01:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:27,644 INFO L93 Difference]: Finished difference Result 1055 states and 3347 transitions. [2022-01-28 15:01:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:01:27,644 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 [2022-01-28 15:01:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:27,646 INFO L225 Difference]: With dead ends: 1055 [2022-01-28 15:01:27,646 INFO L226 Difference]: Without dead ends: 1032 [2022-01-28 15:01:27,646 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 [2022-01-28 15:01:27,646 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 98 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:27,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 196 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 449 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-01-28 15:01:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-28 15:01:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 747. [2022-01-28 15:01:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.306970509383378) internal successors, (2467), 746 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2467 transitions. [2022-01-28 15:01:27,656 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2467 transitions. Word has length 21 [2022-01-28 15:01:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:27,656 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2467 transitions. [2022-01-28 15:01:27,656 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) [2022-01-28 15:01:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2467 transitions. [2022-01-28 15:01:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:27,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:27,657 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:27,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Ended with exit code 0 [2022-01-28 15:01:27,857 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 [2022-01-28 15:01:27,857 INFO L402 AbstractCegarLoop]: === Iteration 617 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash -80211805, now seen corresponding path program 605 times [2022-01-28 15:01:27,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:27,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255093368] [2022-01-28 15:01:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:27,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:27,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:27,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255093368] [2022-01-28 15:01:27,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255093368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:27,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561234326] [2022-01-28 15:01:27,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:01:27,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:27,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:27,980 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) [2022-01-28 15:01:27,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Waiting until timeout for monitored process [2022-01-28 15:01:28,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:28,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:28,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:28,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:28,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:28,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:28,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:28,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:28,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:28,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:28,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:28,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:28,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:28,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:28,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:28,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:28,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:28,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561234326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:28,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:28,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:01:28,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729751230] [2022-01-28 15:01:28,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:28,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:28,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:28,388 INFO L87 Difference]: Start difference. First operand 747 states and 2467 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) [2022-01-28 15:01:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:28,534 INFO L93 Difference]: Finished difference Result 832 states and 2694 transitions. [2022-01-28 15:01:28,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:01:28,534 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 [2022-01-28 15:01:28,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:28,536 INFO L225 Difference]: With dead ends: 832 [2022-01-28 15:01:28,536 INFO L226 Difference]: Without dead ends: 803 [2022-01-28 15:01:28,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:28,536 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:28,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 151 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 370 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-01-28 15:01:28,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-28 15:01:28,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 747. [2022-01-28 15:01:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.306970509383378) internal successors, (2467), 746 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2467 transitions. [2022-01-28 15:01:28,544 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2467 transitions. Word has length 21 [2022-01-28 15:01:28,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:28,544 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2467 transitions. [2022-01-28 15:01:28,544 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) [2022-01-28 15:01:28,544 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2467 transitions. [2022-01-28 15:01:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:28,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:28,545 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] [2022-01-28 15:01:28,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Ended with exit code 0 [2022-01-28 15:01:28,745 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 [2022-01-28 15:01:28,745 INFO L402 AbstractCegarLoop]: === Iteration 618 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:28,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1725792228, now seen corresponding path program 606 times [2022-01-28 15:01:28,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:28,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082411619] [2022-01-28 15:01:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:28,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:28,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:28,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082411619] [2022-01-28 15:01:28,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082411619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:28,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865398223] [2022-01-28 15:01:28,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:28,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:28,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:28,872 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) [2022-01-28 15:01:28,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Waiting until timeout for monitored process [2022-01-28 15:01:28,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:01:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:29,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:29,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:29,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:29,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:29,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:29,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:29,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:29,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:29,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:29,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:29,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:29,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:29,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:29,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865398223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:29,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:29,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:29,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404120999] [2022-01-28 15:01:29,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:29,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:29,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:29,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:29,398 INFO L87 Difference]: Start difference. First operand 747 states and 2467 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) [2022-01-28 15:01:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:29,769 INFO L93 Difference]: Finished difference Result 1004 states and 3191 transitions. [2022-01-28 15:01:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:01:29,769 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 [2022-01-28 15:01:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:29,770 INFO L225 Difference]: With dead ends: 1004 [2022-01-28 15:01:29,770 INFO L226 Difference]: Without dead ends: 981 [2022-01-28 15:01:29,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:01:29,771 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:29,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 222 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 612 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2022-01-28 15:01:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-01-28 15:01:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 749. [2022-01-28 15:01:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.307486631016043) internal successors, (2474), 748 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2474 transitions. [2022-01-28 15:01:29,780 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2474 transitions. Word has length 21 [2022-01-28 15:01:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:29,780 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2474 transitions. [2022-01-28 15:01:29,780 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) [2022-01-28 15:01:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2474 transitions. [2022-01-28 15:01:29,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:29,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:29,781 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:29,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Ended with exit code 0 [2022-01-28 15:01:29,981 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 [2022-01-28 15:01:29,981 INFO L402 AbstractCegarLoop]: === Iteration 619 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -572807567, now seen corresponding path program 607 times [2022-01-28 15:01:29,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:29,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662639160] [2022-01-28 15:01:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:29,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:30,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:30,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662639160] [2022-01-28 15:01:30,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662639160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:30,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371765407] [2022-01-28 15:01:30,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:30,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:30,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:30,088 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) [2022-01-28 15:01:30,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Waiting until timeout for monitored process [2022-01-28 15:01:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:30,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:30,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:30,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:30,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:30,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:30,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:30,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:30,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:30,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:30,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:30,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:30,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:30,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:30,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:30,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:30,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371765407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:30,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:30,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:01:30,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110449165] [2022-01-28 15:01:30,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:30,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:30,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:30,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:30,501 INFO L87 Difference]: Start difference. First operand 749 states and 2474 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) [2022-01-28 15:01:30,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:30,620 INFO L93 Difference]: Finished difference Result 831 states and 2696 transitions. [2022-01-28 15:01:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:01:30,620 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 [2022-01-28 15:01:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:30,621 INFO L225 Difference]: With dead ends: 831 [2022-01-28 15:01:30,621 INFO L226 Difference]: Without dead ends: 802 [2022-01-28 15:01:30,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:30,622 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:30,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 186 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 264 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2022-01-28 15:01:30,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-28 15:01:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 749. [2022-01-28 15:01:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.307486631016043) internal successors, (2474), 748 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2474 transitions. [2022-01-28 15:01:30,630 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2474 transitions. Word has length 21 [2022-01-28 15:01:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:30,630 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2474 transitions. [2022-01-28 15:01:30,630 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) [2022-01-28 15:01:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2474 transitions. [2022-01-28 15:01:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:30,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:30,631 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] [2022-01-28 15:01:30,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Ended with exit code 0 [2022-01-28 15:01:30,831 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 [2022-01-28 15:01:30,831 INFO L402 AbstractCegarLoop]: === Iteration 620 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1734552038, now seen corresponding path program 608 times [2022-01-28 15:01:30,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:30,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161468082] [2022-01-28 15:01:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:30,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:30,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161468082] [2022-01-28 15:01:30,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161468082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:30,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2802197] [2022-01-28 15:01:30,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:30,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:30,936 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) [2022-01-28 15:01:30,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Waiting until timeout for monitored process [2022-01-28 15:01:30,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:30,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:30,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:30,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:31,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:31,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:31,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:31,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:31,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:31,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:31,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:31,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:31,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:31,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:31,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:31,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:31,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:31,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2802197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:31,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:31,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:31,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025040924] [2022-01-28 15:01:31,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:31,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:31,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:31,447 INFO L87 Difference]: Start difference. First operand 749 states and 2474 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) [2022-01-28 15:01:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:31,634 INFO L93 Difference]: Finished difference Result 887 states and 2880 transitions. [2022-01-28 15:01:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:01:31,635 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 [2022-01-28 15:01:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:31,636 INFO L225 Difference]: With dead ends: 887 [2022-01-28 15:01:31,636 INFO L226 Difference]: Without dead ends: 868 [2022-01-28 15:01:31,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:01:31,636 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:31,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 398 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2022-01-28 15:01:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-28 15:01:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 751. [2022-01-28 15:01:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.308) internal successors, (2481), 750 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2481 transitions. [2022-01-28 15:01:31,645 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2481 transitions. Word has length 21 [2022-01-28 15:01:31,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:31,645 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2481 transitions. [2022-01-28 15:01:31,645 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) [2022-01-28 15:01:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2481 transitions. [2022-01-28 15:01:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:31,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:31,646 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] [2022-01-28 15:01:31,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:31,846 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 [2022-01-28 15:01:31,846 INFO L402 AbstractCegarLoop]: === Iteration 621 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1679976198, now seen corresponding path program 609 times [2022-01-28 15:01:31,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:31,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980854409] [2022-01-28 15:01:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:31,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:31,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980854409] [2022-01-28 15:01:31,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980854409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090078628] [2022-01-28 15:01:31,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:01:31,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:31,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:31,969 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) [2022-01-28 15:01:31,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Waiting until timeout for monitored process [2022-01-28 15:01:31,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:01:31,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:31,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:31,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:32,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:32,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:32,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:32,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:32,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:32,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:32,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:32,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:32,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:32,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:32,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:32,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:32,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:32,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090078628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:32,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:32,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:32,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630396755] [2022-01-28 15:01:32,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:32,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:32,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:32,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:32,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:32,542 INFO L87 Difference]: Start difference. First operand 751 states and 2481 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) [2022-01-28 15:01:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:32,777 INFO L93 Difference]: Finished difference Result 941 states and 3014 transitions. [2022-01-28 15:01:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:32,778 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 [2022-01-28 15:01:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:32,779 INFO L225 Difference]: With dead ends: 941 [2022-01-28 15:01:32,779 INFO L226 Difference]: Without dead ends: 926 [2022-01-28 15:01:32,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:01:32,779 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:32,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 202 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 500 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-01-28 15:01:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-28 15:01:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 755. [2022-01-28 15:01:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.3037135278514587) internal successors, (2491), 754 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) [2022-01-28 15:01:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2491 transitions. [2022-01-28 15:01:32,788 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2491 transitions. Word has length 21 [2022-01-28 15:01:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:32,788 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2491 transitions. [2022-01-28 15:01:32,788 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) [2022-01-28 15:01:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2491 transitions. [2022-01-28 15:01:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:32,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:32,789 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:32,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (610)] Ended with exit code 0 [2022-01-28 15:01:32,989 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 [2022-01-28 15:01:32,990 INFO L402 AbstractCegarLoop]: === Iteration 622 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1239777148, now seen corresponding path program 610 times [2022-01-28 15:01:32,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:32,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713056067] [2022-01-28 15:01:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:32,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:33,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:33,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713056067] [2022-01-28 15:01:33,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713056067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:33,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814061545] [2022-01-28 15:01:33,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:01:33,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:33,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:33,106 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) [2022-01-28 15:01:33,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Waiting until timeout for monitored process [2022-01-28 15:01:33,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:01:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:33,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:33,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:33,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:33,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:33,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:33,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:33,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:33,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:33,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:33,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:33,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:33,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:33,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:33,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:33,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:33,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814061545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:33,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:33,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:33,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708651143] [2022-01-28 15:01:33,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:33,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:33,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:33,702 INFO L87 Difference]: Start difference. First operand 755 states and 2491 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) [2022-01-28 15:01:33,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:33,948 INFO L93 Difference]: Finished difference Result 932 states and 2991 transitions. [2022-01-28 15:01:33,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:33,949 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 [2022-01-28 15:01:33,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:33,950 INFO L225 Difference]: With dead ends: 932 [2022-01-28 15:01:33,950 INFO L226 Difference]: Without dead ends: 925 [2022-01-28 15:01:33,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:01:33,950 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:33,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 190 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 512 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-01-28 15:01:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-01-28 15:01:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 757. [2022-01-28 15:01:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.3002645502645502) internal successors, (2495), 756 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) [2022-01-28 15:01:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2495 transitions. [2022-01-28 15:01:33,959 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2495 transitions. Word has length 21 [2022-01-28 15:01:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:33,959 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2495 transitions. [2022-01-28 15:01:33,959 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) [2022-01-28 15:01:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2495 transitions. [2022-01-28 15:01:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:33,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:33,960 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] [2022-01-28 15:01:33,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (611)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:34,160 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 [2022-01-28 15:01:34,161 INFO L402 AbstractCegarLoop]: === Iteration 623 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:34,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1915159076, now seen corresponding path program 611 times [2022-01-28 15:01:34,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:34,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627468518] [2022-01-28 15:01:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:34,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:34,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:34,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627468518] [2022-01-28 15:01:34,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627468518] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:34,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006896608] [2022-01-28 15:01:34,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:01:34,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:34,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:34,276 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) [2022-01-28 15:01:34,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Waiting until timeout for monitored process [2022-01-28 15:01:34,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:34,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:34,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:34,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:34,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:34,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:34,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:34,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:34,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:34,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:34,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:34,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:34,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:34,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:34,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:34,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:34,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006896608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:34,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:34,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:34,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209378090] [2022-01-28 15:01:34,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:34,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:34,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:34,903 INFO L87 Difference]: Start difference. First operand 757 states and 2495 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) [2022-01-28 15:01:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:35,189 INFO L93 Difference]: Finished difference Result 927 states and 2980 transitions. [2022-01-28 15:01:35,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:35,189 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 [2022-01-28 15:01:35,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:35,190 INFO L225 Difference]: With dead ends: 927 [2022-01-28 15:01:35,190 INFO L226 Difference]: Without dead ends: 924 [2022-01-28 15:01:35,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:01:35,191 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:35,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 272 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 644 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-01-28 15:01:35,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-28 15:01:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 749. [2022-01-28 15:01:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.307486631016043) internal successors, (2474), 748 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2474 transitions. [2022-01-28 15:01:35,199 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2474 transitions. Word has length 21 [2022-01-28 15:01:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:35,199 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2474 transitions. [2022-01-28 15:01:35,199 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) [2022-01-28 15:01:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2474 transitions. [2022-01-28 15:01:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:35,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:35,200 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:35,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (612)] Ended with exit code 0 [2022-01-28 15:01:35,408 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 [2022-01-28 15:01:35,408 INFO L402 AbstractCegarLoop]: === Iteration 624 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash 318349933, now seen corresponding path program 612 times [2022-01-28 15:01:35,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:35,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056944677] [2022-01-28 15:01:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:35,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:35,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:35,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056944677] [2022-01-28 15:01:35,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056944677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:35,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657176283] [2022-01-28 15:01:35,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:35,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:35,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:35,512 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) [2022-01-28 15:01:35,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Waiting until timeout for monitored process [2022-01-28 15:01:35,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:01:35,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:35,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:35,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:35,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:35,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:35,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:35,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:35,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:35,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:35,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:35,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:35,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:35,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:35,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:35,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:35,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657176283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:35,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:35,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-01-28 15:01:35,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179208146] [2022-01-28 15:01:35,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:35,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:35,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:35,979 INFO L87 Difference]: Start difference. First operand 749 states and 2474 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) [2022-01-28 15:01:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:36,155 INFO L93 Difference]: Finished difference Result 853 states and 2743 transitions. [2022-01-28 15:01:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:01:36,155 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 [2022-01-28 15:01:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:36,156 INFO L225 Difference]: With dead ends: 853 [2022-01-28 15:01:36,156 INFO L226 Difference]: Without dead ends: 817 [2022-01-28 15:01:36,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:36,157 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:36,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 186 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 473 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-01-28 15:01:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-28 15:01:36,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 745. [2022-01-28 15:01:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.3091397849462365) internal successors, (2462), 744 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) [2022-01-28 15:01:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2462 transitions. [2022-01-28 15:01:36,166 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2462 transitions. Word has length 21 [2022-01-28 15:01:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:36,166 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2462 transitions. [2022-01-28 15:01:36,166 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) [2022-01-28 15:01:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2462 transitions. [2022-01-28 15:01:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:36,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:36,167 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:36,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (613)] Ended with exit code 0 [2022-01-28 15:01:36,367 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 [2022-01-28 15:01:36,367 INFO L402 AbstractCegarLoop]: === Iteration 625 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:36,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:36,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1107553685, now seen corresponding path program 613 times [2022-01-28 15:01:36,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:36,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753283978] [2022-01-28 15:01:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:36,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:36,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753283978] [2022-01-28 15:01:36,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753283978] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218751674] [2022-01-28 15:01:36,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:36,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:36,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:36,475 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) [2022-01-28 15:01:36,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Waiting until timeout for monitored process [2022-01-28 15:01:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:36,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:36,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:36,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:36,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:36,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:36,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:36,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:36,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:36,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:36,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:36,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:36,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:36,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:36,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218751674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:36,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:36,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:36,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965865002] [2022-01-28 15:01:36,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:36,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:36,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:36,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:36,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:36,927 INFO L87 Difference]: Start difference. First operand 745 states and 2462 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) [2022-01-28 15:01:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:37,237 INFO L93 Difference]: Finished difference Result 965 states and 3126 transitions. [2022-01-28 15:01:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:37,237 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 [2022-01-28 15:01:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:37,238 INFO L225 Difference]: With dead ends: 965 [2022-01-28 15:01:37,238 INFO L226 Difference]: Without dead ends: 944 [2022-01-28 15:01:37,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:01:37,239 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:37,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 165 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 466 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-01-28 15:01:37,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-01-28 15:01:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 751. [2022-01-28 15:01:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3106666666666666) internal successors, (2483), 750 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) [2022-01-28 15:01:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2483 transitions. [2022-01-28 15:01:37,254 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2483 transitions. Word has length 21 [2022-01-28 15:01:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:37,254 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2483 transitions. [2022-01-28 15:01:37,254 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) [2022-01-28 15:01:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2483 transitions. [2022-01-28 15:01:37,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:37,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:37,255 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:37,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (614)] Ended with exit code 0 [2022-01-28 15:01:37,455 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 [2022-01-28 15:01:37,455 INFO L402 AbstractCegarLoop]: === Iteration 626 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:37,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:37,456 INFO L85 PathProgramCache]: Analyzing trace with hash 330669429, now seen corresponding path program 614 times [2022-01-28 15:01:37,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:37,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969535482] [2022-01-28 15:01:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:37,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:37,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:37,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969535482] [2022-01-28 15:01:37,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969535482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:37,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500957403] [2022-01-28 15:01:37,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:37,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:37,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:37,580 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) [2022-01-28 15:01:37,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Waiting until timeout for monitored process [2022-01-28 15:01:37,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:37,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:37,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:37,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:37,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:37,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:37,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:37,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:37,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:37,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:37,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:38,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:38,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:38,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:38,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:38,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500957403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:38,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:38,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:38,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880939817] [2022-01-28 15:01:38,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:38,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:38,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:38,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:38,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:38,084 INFO L87 Difference]: Start difference. First operand 751 states and 2483 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) [2022-01-28 15:01:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:38,415 INFO L93 Difference]: Finished difference Result 1005 states and 3226 transitions. [2022-01-28 15:01:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:38,415 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 [2022-01-28 15:01:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:38,416 INFO L225 Difference]: With dead ends: 1005 [2022-01-28 15:01:38,416 INFO L226 Difference]: Without dead ends: 990 [2022-01-28 15:01:38,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:01:38,417 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:38,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 174 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 427 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2022-01-28 15:01:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-28 15:01:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 749. [2022-01-28 15:01:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3101604278074865) internal successors, (2476), 748 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2476 transitions. [2022-01-28 15:01:38,426 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2476 transitions. Word has length 21 [2022-01-28 15:01:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:38,426 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2476 transitions. [2022-01-28 15:01:38,426 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) [2022-01-28 15:01:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2476 transitions. [2022-01-28 15:01:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:38,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:38,427 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] [2022-01-28 15:01:38,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (615)] Ended with exit code 0 [2022-01-28 15:01:38,627 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 [2022-01-28 15:01:38,627 INFO L402 AbstractCegarLoop]: === Iteration 627 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:38,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:38,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1703659601, now seen corresponding path program 615 times [2022-01-28 15:01:38,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:38,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008091813] [2022-01-28 15:01:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:38,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:38,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008091813] [2022-01-28 15:01:38,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008091813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241002940] [2022-01-28 15:01:38,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:01:38,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:38,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:38,758 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) [2022-01-28 15:01:38,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Waiting until timeout for monitored process [2022-01-28 15:01:38,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:01:38,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:38,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:38,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:38,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:38,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:38,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:38,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:38,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:38,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:39,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:39,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:39,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:39,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:39,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:39,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:39,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241002940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:39,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:39,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:39,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116339984] [2022-01-28 15:01:39,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:39,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:39,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:39,220 INFO L87 Difference]: Start difference. First operand 749 states and 2476 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) [2022-01-28 15:01:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:39,612 INFO L93 Difference]: Finished difference Result 995 states and 3209 transitions. [2022-01-28 15:01:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:39,612 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 [2022-01-28 15:01:39,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:39,613 INFO L225 Difference]: With dead ends: 995 [2022-01-28 15:01:39,614 INFO L226 Difference]: Without dead ends: 974 [2022-01-28 15:01:39,614 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 [2022-01-28 15:01:39,614 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:39,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 175 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 567 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-01-28 15:01:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-01-28 15:01:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 749. [2022-01-28 15:01:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3101604278074865) internal successors, (2476), 748 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2476 transitions. [2022-01-28 15:01:39,623 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2476 transitions. Word has length 21 [2022-01-28 15:01:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:39,623 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2476 transitions. [2022-01-28 15:01:39,623 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) [2022-01-28 15:01:39,623 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2476 transitions. [2022-01-28 15:01:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:39,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:39,624 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:39,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (616)] Ended with exit code 0 [2022-01-28 15:01:39,824 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 [2022-01-28 15:01:39,824 INFO L402 AbstractCegarLoop]: === Iteration 628 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2065807055, now seen corresponding path program 616 times [2022-01-28 15:01:39,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:39,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103765207] [2022-01-28 15:01:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:39,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:39,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103765207] [2022-01-28 15:01:39,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103765207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772955641] [2022-01-28 15:01:39,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:01:39,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:39,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:39,935 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) [2022-01-28 15:01:39,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Waiting until timeout for monitored process [2022-01-28 15:01:39,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:01:39,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:39,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:39,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:40,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:40,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:40,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:40,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:40,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:40,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:40,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:40,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:40,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:40,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:40,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:40,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:40,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772955641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:40,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:40,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:40,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897689411] [2022-01-28 15:01:40,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:40,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:40,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:40,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:40,418 INFO L87 Difference]: Start difference. First operand 749 states and 2476 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) [2022-01-28 15:01:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:40,820 INFO L93 Difference]: Finished difference Result 992 states and 3204 transitions. [2022-01-28 15:01:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:40,821 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 [2022-01-28 15:01:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:40,822 INFO L225 Difference]: With dead ends: 992 [2022-01-28 15:01:40,822 INFO L226 Difference]: Without dead ends: 971 [2022-01-28 15:01:40,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:01:40,822 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:40,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 244 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 693 Invalid, 0 Unknown, 191 Unchecked, 0.3s Time] [2022-01-28 15:01:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-01-28 15:01:40,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 749. [2022-01-28 15:01:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.3101604278074865) internal successors, (2476), 748 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2476 transitions. [2022-01-28 15:01:40,831 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2476 transitions. Word has length 21 [2022-01-28 15:01:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:40,831 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2476 transitions. [2022-01-28 15:01:40,831 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) [2022-01-28 15:01:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2476 transitions. [2022-01-28 15:01:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:40,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:40,832 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:40,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (617)] Ended with exit code 0 [2022-01-28 15:01:41,032 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 [2022-01-28 15:01:41,033 INFO L402 AbstractCegarLoop]: === Iteration 629 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1076746507, now seen corresponding path program 617 times [2022-01-28 15:01:41,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454932381] [2022-01-28 15:01:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:41,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:41,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:41,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454932381] [2022-01-28 15:01:41,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454932381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:41,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132840606] [2022-01-28 15:01:41,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:01:41,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:41,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:41,158 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) [2022-01-28 15:01:41,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Waiting until timeout for monitored process [2022-01-28 15:01:41,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:41,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:41,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:41,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:41,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:41,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:41,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:41,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:41,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:41,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:41,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:41,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:41,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:41,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:41,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:41,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:41,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132840606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:41,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:41,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:41,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910031252] [2022-01-28 15:01:41,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:41,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:41,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:41,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:41,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:41,655 INFO L87 Difference]: Start difference. First operand 749 states and 2476 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) [2022-01-28 15:01:42,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:42,005 INFO L93 Difference]: Finished difference Result 1017 states and 3277 transitions. [2022-01-28 15:01:42,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:42,005 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 [2022-01-28 15:01:42,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:42,007 INFO L225 Difference]: With dead ends: 1017 [2022-01-28 15:01:42,007 INFO L226 Difference]: Without dead ends: 996 [2022-01-28 15:01:42,007 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 [2022-01-28 15:01:42,007 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:42,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 156 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 454 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-01-28 15:01:42,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-01-28 15:01:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 748. [2022-01-28 15:01:42,015 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) [2022-01-28 15:01:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2471 transitions. [2022-01-28 15:01:42,016 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2471 transitions. Word has length 21 [2022-01-28 15:01:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:42,016 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2471 transitions. [2022-01-28 15:01:42,016 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) [2022-01-28 15:01:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2471 transitions. [2022-01-28 15:01:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:42,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:42,017 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:42,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (618)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:42,217 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 [2022-01-28 15:01:42,217 INFO L402 AbstractCegarLoop]: === Iteration 630 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:42,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:42,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1211063839, now seen corresponding path program 618 times [2022-01-28 15:01:42,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:42,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693201530] [2022-01-28 15:01:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:42,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:42,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:42,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693201530] [2022-01-28 15:01:42,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693201530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:42,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082455568] [2022-01-28 15:01:42,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:42,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:42,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:42,343 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) [2022-01-28 15:01:42,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Waiting until timeout for monitored process [2022-01-28 15:01:42,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:01:42,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:42,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:42,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:42,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:42,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:42,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:42,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:42,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:42,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:42,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:42,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:42,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:42,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:42,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:42,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:42,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:42,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:42,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082455568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:42,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:42,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:42,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463451955] [2022-01-28 15:01:42,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:42,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:42,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:42,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:42,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:42,821 INFO L87 Difference]: Start difference. First operand 748 states and 2471 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) [2022-01-28 15:01:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:43,165 INFO L93 Difference]: Finished difference Result 894 states and 2910 transitions. [2022-01-28 15:01:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:01:43,165 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 [2022-01-28 15:01:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:43,166 INFO L225 Difference]: With dead ends: 894 [2022-01-28 15:01:43,166 INFO L226 Difference]: Without dead ends: 873 [2022-01-28 15:01:43,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:01:43,167 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:43,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 189 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 609 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-01-28 15:01:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-01-28 15:01:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 751. [2022-01-28 15:01:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.3106666666666666) internal successors, (2483), 750 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) [2022-01-28 15:01:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2483 transitions. [2022-01-28 15:01:43,175 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2483 transitions. Word has length 21 [2022-01-28 15:01:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:43,175 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2483 transitions. [2022-01-28 15:01:43,175 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) [2022-01-28 15:01:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2483 transitions. [2022-01-28 15:01:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:43,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:43,176 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:43,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (619)] Ended with exit code 0 [2022-01-28 15:01:43,376 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 [2022-01-28 15:01:43,377 INFO L402 AbstractCegarLoop]: === Iteration 631 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash -312743245, now seen corresponding path program 619 times [2022-01-28 15:01:43,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:43,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861071166] [2022-01-28 15:01:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:43,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:43,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:43,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861071166] [2022-01-28 15:01:43,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861071166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:43,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329055819] [2022-01-28 15:01:43,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:43,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:43,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:43,496 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) [2022-01-28 15:01:43,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Waiting until timeout for monitored process [2022-01-28 15:01:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:43,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:43,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:43,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:43,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:43,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:43,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:43,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:43,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:43,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:43,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:43,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:43,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:43,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:43,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:44,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329055819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:44,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:44,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:44,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679271822] [2022-01-28 15:01:44,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:44,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:44,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:44,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:44,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:44,024 INFO L87 Difference]: Start difference. First operand 751 states and 2483 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) [2022-01-28 15:01:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:44,330 INFO L93 Difference]: Finished difference Result 960 states and 3087 transitions. [2022-01-28 15:01:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:44,331 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 [2022-01-28 15:01:44,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:44,332 INFO L225 Difference]: With dead ends: 960 [2022-01-28 15:01:44,332 INFO L226 Difference]: Without dead ends: 939 [2022-01-28 15:01:44,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:01:44,332 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:44,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 220 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 543 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-01-28 15:01:44,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-01-28 15:01:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 760. [2022-01-28 15:01:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.310935441370224) internal successors, (2513), 759 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) [2022-01-28 15:01:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2513 transitions. [2022-01-28 15:01:44,341 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2513 transitions. Word has length 21 [2022-01-28 15:01:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:44,341 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2513 transitions. [2022-01-28 15:01:44,342 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) [2022-01-28 15:01:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2513 transitions. [2022-01-28 15:01:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:44,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:44,342 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:44,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (620)] Forceful destruction successful, exit code 0 [2022-01-28 15:01:44,543 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 [2022-01-28 15:01:44,543 INFO L402 AbstractCegarLoop]: === Iteration 632 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:44,543 INFO L85 PathProgramCache]: Analyzing trace with hash -630783755, now seen corresponding path program 620 times [2022-01-28 15:01:44,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:44,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801474265] [2022-01-28 15:01:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:44,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:44,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:44,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801474265] [2022-01-28 15:01:44,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801474265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:44,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802149815] [2022-01-28 15:01:44,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:44,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:44,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:44,666 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) [2022-01-28 15:01:44,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Waiting until timeout for monitored process [2022-01-28 15:01:44,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:44,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:44,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:44,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:44,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:44,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:44,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:44,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:44,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:44,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:44,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:45,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:45,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:45,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:45,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:45,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:45,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:45,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802149815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:45,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:45,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:45,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522240045] [2022-01-28 15:01:45,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:45,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:45,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:45,234 INFO L87 Difference]: Start difference. First operand 760 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) [2022-01-28 15:01:45,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:45,415 INFO L93 Difference]: Finished difference Result 998 states and 3205 transitions. [2022-01-28 15:01:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:01:45,415 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 [2022-01-28 15:01:45,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:45,417 INFO L225 Difference]: With dead ends: 998 [2022-01-28 15:01:45,417 INFO L226 Difference]: Without dead ends: 989 [2022-01-28 15:01:45,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:01:45,417 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:45,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 130 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 307 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-01-28 15:01:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-28 15:01:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 765. [2022-01-28 15:01:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.3154450261780104) internal successors, (2533), 764 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) [2022-01-28 15:01:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2533 transitions. [2022-01-28 15:01:45,426 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2533 transitions. Word has length 21 [2022-01-28 15:01:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:45,426 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2533 transitions. [2022-01-28 15:01:45,426 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) [2022-01-28 15:01:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2533 transitions. [2022-01-28 15:01:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:45,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:45,427 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] [2022-01-28 15:01:45,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (621)] Ended with exit code 0 [2022-01-28 15:01:45,627 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 [2022-01-28 15:01:45,628 INFO L402 AbstractCegarLoop]: === Iteration 633 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash -43868153, now seen corresponding path program 621 times [2022-01-28 15:01:45,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:45,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140668058] [2022-01-28 15:01:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:45,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:45,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:45,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140668058] [2022-01-28 15:01:45,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140668058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:45,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925534747] [2022-01-28 15:01:45,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:01:45,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:45,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:45,749 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) [2022-01-28 15:01:45,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Waiting until timeout for monitored process [2022-01-28 15:01:45,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:01:45,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:45,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:01:45,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:45,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:45,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:46,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:46,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:46,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:46,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:46,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:46,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:46,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:46,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:46,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:46,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:46,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:46,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925534747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:46,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:46,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:46,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654992518] [2022-01-28 15:01:46,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:46,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:46,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:46,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:46,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:46,419 INFO L87 Difference]: Start difference. First operand 765 states and 2533 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) [2022-01-28 15:01:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:46,830 INFO L93 Difference]: Finished difference Result 1064 states and 3377 transitions. [2022-01-28 15:01:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:01:46,831 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 [2022-01-28 15:01:46,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:46,832 INFO L225 Difference]: With dead ends: 1064 [2022-01-28 15:01:46,833 INFO L226 Difference]: Without dead ends: 1005 [2022-01-28 15:01:46,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:01:46,833 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 78 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:46,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 204 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 589 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2022-01-28 15:01:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-28 15:01:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 771. [2022-01-28 15:01:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.3) internal successors, (2541), 770 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) [2022-01-28 15:01:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2541 transitions. [2022-01-28 15:01:46,842 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2541 transitions. Word has length 21 [2022-01-28 15:01:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:46,842 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 2541 transitions. [2022-01-28 15:01:46,843 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) [2022-01-28 15:01:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2541 transitions. [2022-01-28 15:01:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:46,844 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:46,844 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:46,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (622)] Ended with exit code 0 [2022-01-28 15:01:47,044 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 [2022-01-28 15:01:47,044 INFO L402 AbstractCegarLoop]: === Iteration 634 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash -719250081, now seen corresponding path program 622 times [2022-01-28 15:01:47,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:47,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953787335] [2022-01-28 15:01:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:47,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:47,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:47,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953787335] [2022-01-28 15:01:47,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953787335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:47,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768756814] [2022-01-28 15:01:47,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:01:47,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:47,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:47,167 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) [2022-01-28 15:01:47,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Waiting until timeout for monitored process [2022-01-28 15:01:47,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:01:47,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:47,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:47,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:47,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:47,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:47,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:47,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:47,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:47,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:47,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:47,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:47,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:47,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:47,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:47,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:47,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:47,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768756814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:47,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:47,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:47,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968760920] [2022-01-28 15:01:47,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:47,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:47,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:47,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:47,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:47,788 INFO L87 Difference]: Start difference. First operand 771 states and 2541 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) [2022-01-28 15:01:48,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:48,059 INFO L93 Difference]: Finished difference Result 964 states and 3081 transitions. [2022-01-28 15:01:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:01:48,060 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 [2022-01-28 15:01:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:48,061 INFO L225 Difference]: With dead ends: 964 [2022-01-28 15:01:48,061 INFO L226 Difference]: Without dead ends: 958 [2022-01-28 15:01:48,061 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 [2022-01-28 15:01:48,061 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:48,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 178 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 446 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-01-28 15:01:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-01-28 15:01:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 763. [2022-01-28 15:01:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.3070866141732282) internal successors, (2520), 762 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) [2022-01-28 15:01:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2520 transitions. [2022-01-28 15:01:48,070 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2520 transitions. Word has length 21 [2022-01-28 15:01:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:48,070 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2520 transitions. [2022-01-28 15:01:48,070 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) [2022-01-28 15:01:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2520 transitions. [2022-01-28 15:01:48,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:48,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:48,071 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] [2022-01-28 15:01:48,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (623)] Ended with exit code 0 [2022-01-28 15:01:48,271 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 [2022-01-28 15:01:48,272 INFO L402 AbstractCegarLoop]: === Iteration 635 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:48,272 INFO L85 PathProgramCache]: Analyzing trace with hash 700637567, now seen corresponding path program 623 times [2022-01-28 15:01:48,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:48,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808380120] [2022-01-28 15:01:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:48,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:48,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808380120] [2022-01-28 15:01:48,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808380120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:48,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086409606] [2022-01-28 15:01:48,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:01:48,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:48,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:48,392 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) [2022-01-28 15:01:48,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (624)] Waiting until timeout for monitored process [2022-01-28 15:01:48,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:48,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:48,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:48,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:48,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:48,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:48,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:48,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:48,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:48,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:48,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:48,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:48,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:48,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:48,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 15:01:48,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:48,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 15:01:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:49,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086409606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:49,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:49,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:49,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884469637] [2022-01-28 15:01:49,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:49,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:49,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:49,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:49,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:49,002 INFO L87 Difference]: Start difference. First operand 763 states and 2520 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) [2022-01-28 15:01:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:49,257 INFO L93 Difference]: Finished difference Result 947 states and 3046 transitions. [2022-01-28 15:01:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:01:49,258 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 [2022-01-28 15:01:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:49,259 INFO L225 Difference]: With dead ends: 947 [2022-01-28 15:01:49,259 INFO L226 Difference]: Without dead ends: 944 [2022-01-28 15:01:49,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:01:49,259 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:49,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 147 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 430 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-01-28 15:01:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-01-28 15:01:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 753. [2022-01-28 15:01:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3164893617021276) internal successors, (2494), 752 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:01:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2494 transitions. [2022-01-28 15:01:49,268 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2494 transitions. Word has length 21 [2022-01-28 15:01:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:49,268 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 2494 transitions. [2022-01-28 15:01:49,268 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) [2022-01-28 15:01:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2494 transitions. [2022-01-28 15:01:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:49,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:49,269 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] [2022-01-28 15:01:49,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (624)] Ended with exit code 0 [2022-01-28 15:01:49,469 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 [2022-01-28 15:01:49,469 INFO L402 AbstractCegarLoop]: === Iteration 636 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:49,470 INFO L85 PathProgramCache]: Analyzing trace with hash -971318702, now seen corresponding path program 624 times [2022-01-28 15:01:49,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:49,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116854966] [2022-01-28 15:01:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:49,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:49,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:49,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116854966] [2022-01-28 15:01:49,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116854966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:49,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581986730] [2022-01-28 15:01:49,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:49,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:49,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:49,588 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) [2022-01-28 15:01:49,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (625)] Waiting until timeout for monitored process [2022-01-28 15:01:49,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:01:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:49,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:49,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:49,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:49,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:49,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:49,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:49,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:50,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:50,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:50,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:50,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:50,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:50,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:50,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581986730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:50,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:50,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:01:50,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013645456] [2022-01-28 15:01:50,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:50,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:01:50,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:50,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:01:50,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:01:50,116 INFO L87 Difference]: Start difference. First operand 753 states and 2494 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) [2022-01-28 15:01:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:50,586 INFO L93 Difference]: Finished difference Result 1082 states and 3485 transitions. [2022-01-28 15:01:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 15:01:50,586 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 [2022-01-28 15:01:50,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:50,588 INFO L225 Difference]: With dead ends: 1082 [2022-01-28 15:01:50,588 INFO L226 Difference]: Without dead ends: 1063 [2022-01-28 15:01:50,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:01:50,588 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:50,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 290 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 543 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-01-28 15:01:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-01-28 15:01:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 756. [2022-01-28 15:01:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.3205298013245033) internal successors, (2507), 755 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) [2022-01-28 15:01:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2507 transitions. [2022-01-28 15:01:50,598 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2507 transitions. Word has length 21 [2022-01-28 15:01:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:50,598 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2507 transitions. [2022-01-28 15:01:50,598 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) [2022-01-28 15:01:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2507 transitions. [2022-01-28 15:01:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:50,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:50,599 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:50,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (625)] Ended with exit code 0 [2022-01-28 15:01:50,799 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 [2022-01-28 15:01:50,799 INFO L402 AbstractCegarLoop]: === Iteration 637 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 549283021, now seen corresponding path program 625 times [2022-01-28 15:01:50,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:50,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760985212] [2022-01-28 15:01:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:50,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:50,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760985212] [2022-01-28 15:01:50,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760985212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228519915] [2022-01-28 15:01:50,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:50,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:50,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:50,904 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) [2022-01-28 15:01:50,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (626)] Waiting until timeout for monitored process [2022-01-28 15:01:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:50,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:50,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:51,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:01:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:51,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:51,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:51,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:51,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:51,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:51,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:51,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:51,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228519915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:51,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:51,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:01:51,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967729871] [2022-01-28 15:01:51,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:51,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:51,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:51,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:51,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:51,324 INFO L87 Difference]: Start difference. First operand 756 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) [2022-01-28 15:01:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:51,825 INFO L93 Difference]: Finished difference Result 1143 states and 3637 transitions. [2022-01-28 15:01:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:01:51,825 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 [2022-01-28 15:01:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:51,827 INFO L225 Difference]: With dead ends: 1143 [2022-01-28 15:01:51,827 INFO L226 Difference]: Without dead ends: 1083 [2022-01-28 15:01:51,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:01:51,827 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:51,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 211 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:01:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-01-28 15:01:51,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 758. [2022-01-28 15:01:51,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.3143989431968297) internal successors, (2509), 757 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) [2022-01-28 15:01:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2509 transitions. [2022-01-28 15:01:51,836 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2509 transitions. Word has length 21 [2022-01-28 15:01:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:51,836 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2509 transitions. [2022-01-28 15:01:51,836 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) [2022-01-28 15:01:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2509 transitions. [2022-01-28 15:01:51,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:51,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:51,837 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:51,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (626)] Ended with exit code 0 [2022-01-28 15:01:52,038 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 [2022-01-28 15:01:52,038 INFO L402 AbstractCegarLoop]: === Iteration 638 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1969381902, now seen corresponding path program 626 times [2022-01-28 15:01:52,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:52,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409381371] [2022-01-28 15:01:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:52,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:52,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:52,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409381371] [2022-01-28 15:01:52,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409381371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:52,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250142102] [2022-01-28 15:01:52,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:52,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:52,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:52,144 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) [2022-01-28 15:01:52,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (627)] Waiting until timeout for monitored process [2022-01-28 15:01:52,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:52,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:52,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:52,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:52,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:52,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:52,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:52,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:52,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:01:52,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:52,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:52,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:52,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:52,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:52,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:52,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:52,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:52,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250142102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:52,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:52,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:01:52,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120585822] [2022-01-28 15:01:52,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:52,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:52,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:52,625 INFO L87 Difference]: Start difference. First operand 758 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) [2022-01-28 15:01:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:52,975 INFO L93 Difference]: Finished difference Result 1060 states and 3421 transitions. [2022-01-28 15:01:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:01:52,975 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 [2022-01-28 15:01:52,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:52,977 INFO L225 Difference]: With dead ends: 1060 [2022-01-28 15:01:52,977 INFO L226 Difference]: Without dead ends: 1037 [2022-01-28 15:01:52,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:01:52,977 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:52,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 210 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 582 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-01-28 15:01:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-01-28 15:01:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 756. [2022-01-28 15:01:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.3165562913907283) internal successors, (2504), 755 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) [2022-01-28 15:01:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2504 transitions. [2022-01-28 15:01:52,986 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2504 transitions. Word has length 21 [2022-01-28 15:01:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:52,987 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2504 transitions. [2022-01-28 15:01:52,987 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) [2022-01-28 15:01:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2504 transitions. [2022-01-28 15:01:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:52,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:52,988 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] [2022-01-28 15:01:53,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (627)] Ended with exit code 0 [2022-01-28 15:01:53,188 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 [2022-01-28 15:01:53,188 INFO L402 AbstractCegarLoop]: === Iteration 639 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash -64919201, now seen corresponding path program 627 times [2022-01-28 15:01:53,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:53,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892230738] [2022-01-28 15:01:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:53,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:53,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892230738] [2022-01-28 15:01:53,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892230738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:53,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239890083] [2022-01-28 15:01:53,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:01:53,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:53,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:53,284 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) [2022-01-28 15:01:53,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (628)] Waiting until timeout for monitored process [2022-01-28 15:01:53,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:01:53,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:53,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:53,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:53,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:53,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:53,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:53,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:53,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:53,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:53,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:53,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:53,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239890083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:53,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:53,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 15:01:53,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957216611] [2022-01-28 15:01:53,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:53,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:01:53,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:53,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:01:53,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:01:53,617 INFO L87 Difference]: Start difference. First operand 756 states and 2504 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) [2022-01-28 15:01:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:53,893 INFO L93 Difference]: Finished difference Result 932 states and 2998 transitions. [2022-01-28 15:01:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:01:53,893 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 [2022-01-28 15:01:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:53,895 INFO L225 Difference]: With dead ends: 932 [2022-01-28 15:01:53,895 INFO L226 Difference]: Without dead ends: 888 [2022-01-28 15:01:53,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:53,895 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:53,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 179 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:01:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-28 15:01:53,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 752. [2022-01-28 15:01:53,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.3129161118508654) internal successors, (2488), 751 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) [2022-01-28 15:01:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2488 transitions. [2022-01-28 15:01:53,904 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2488 transitions. Word has length 21 [2022-01-28 15:01:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:53,904 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2488 transitions. [2022-01-28 15:01:53,904 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) [2022-01-28 15:01:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2488 transitions. [2022-01-28 15:01:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:53,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:53,905 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] [2022-01-28 15:01:53,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (628)] Ended with exit code 0 [2022-01-28 15:01:54,105 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 [2022-01-28 15:01:54,105 INFO L402 AbstractCegarLoop]: === Iteration 640 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash 328095510, now seen corresponding path program 628 times [2022-01-28 15:01:54,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:54,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033350736] [2022-01-28 15:01:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:54,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:54,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:54,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033350736] [2022-01-28 15:01:54,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033350736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:54,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577532099] [2022-01-28 15:01:54,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:01:54,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:54,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:54,229 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) [2022-01-28 15:01:54,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (629)] Waiting until timeout for monitored process [2022-01-28 15:01:54,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:01:54,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:54,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:54,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:54,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:54,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:54,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:54,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:54,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:54,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:54,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:54,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577532099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:54,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:54,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:54,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242070355] [2022-01-28 15:01:54,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:54,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:54,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:54,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:54,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:54,659 INFO L87 Difference]: Start difference. First operand 752 states and 2488 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) [2022-01-28 15:01:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:55,117 INFO L93 Difference]: Finished difference Result 1101 states and 3532 transitions. [2022-01-28 15:01:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:01:55,117 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 [2022-01-28 15:01:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:55,119 INFO L225 Difference]: With dead ends: 1101 [2022-01-28 15:01:55,119 INFO L226 Difference]: Without dead ends: 1082 [2022-01-28 15:01:55,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:01:55,120 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:55,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 198 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:01:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-01-28 15:01:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 762. [2022-01-28 15:01:55,130 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) [2022-01-28 15:01:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2526 transitions. [2022-01-28 15:01:55,132 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2526 transitions. Word has length 21 [2022-01-28 15:01:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:55,132 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 2526 transitions. [2022-01-28 15:01:55,132 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) [2022-01-28 15:01:55,132 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2526 transitions. [2022-01-28 15:01:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:55,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:55,133 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:55,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (629)] Ended with exit code 0 [2022-01-28 15:01:55,333 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 [2022-01-28 15:01:55,333 INFO L402 AbstractCegarLoop]: === Iteration 641 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1719259434, now seen corresponding path program 629 times [2022-01-28 15:01:55,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:55,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103745002] [2022-01-28 15:01:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:55,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:55,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:55,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103745002] [2022-01-28 15:01:55,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103745002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:55,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472460082] [2022-01-28 15:01:55,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:01:55,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:55,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:55,461 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) [2022-01-28 15:01:55,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (630)] Waiting until timeout for monitored process [2022-01-28 15:01:55,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:55,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:01:55,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:55,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:55,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:55,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:55,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:55,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:56,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:56,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:56,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:56,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:56,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472460082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:56,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:56,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:01:56,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150235687] [2022-01-28 15:01:56,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:56,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:01:56,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:56,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:01:56,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:01:56,091 INFO L87 Difference]: Start difference. First operand 762 states and 2526 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) [2022-01-28 15:01:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:56,806 INFO L93 Difference]: Finished difference Result 1238 states and 3916 transitions. [2022-01-28 15:01:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 15:01:56,807 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 [2022-01-28 15:01:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:56,809 INFO L225 Difference]: With dead ends: 1238 [2022-01-28 15:01:56,809 INFO L226 Difference]: Without dead ends: 1181 [2022-01-28 15:01:56,809 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 [2022-01-28 15:01:56,809 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 139 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:56,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 255 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:01:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-01-28 15:01:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 760. [2022-01-28 15:01:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.3201581027667983) internal successors, (2520), 759 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) [2022-01-28 15:01:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2520 transitions. [2022-01-28 15:01:56,820 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2520 transitions. Word has length 21 [2022-01-28 15:01:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:56,820 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2520 transitions. [2022-01-28 15:01:56,820 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) [2022-01-28 15:01:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2520 transitions. [2022-01-28 15:01:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:56,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:56,821 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] [2022-01-28 15:01:56,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (630)] Ended with exit code 0 [2022-01-28 15:01:57,021 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 [2022-01-28 15:01:57,022 INFO L402 AbstractCegarLoop]: === Iteration 642 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:57,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1505789197, now seen corresponding path program 630 times [2022-01-28 15:01:57,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:57,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903029729] [2022-01-28 15:01:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:57,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:57,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:57,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903029729] [2022-01-28 15:01:57,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903029729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:57,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710358460] [2022-01-28 15:01:57,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:01:57,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:57,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:57,142 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) [2022-01-28 15:01:57,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (631)] Waiting until timeout for monitored process [2022-01-28 15:01:57,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:01:57,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:57,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:57,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:57,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:57,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:01:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:57,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:57,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:57,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:57,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:57,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:57,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:57,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:57,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710358460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:57,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:57,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:01:57,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98535800] [2022-01-28 15:01:57,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:57,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:01:57,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:57,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:01:57,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:57,583 INFO L87 Difference]: Start difference. First operand 760 states and 2520 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) [2022-01-28 15:01:58,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:58,308 INFO L93 Difference]: Finished difference Result 1207 states and 3801 transitions. [2022-01-28 15:01:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 15:01:58,308 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 [2022-01-28 15:01:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:58,311 INFO L225 Difference]: With dead ends: 1207 [2022-01-28 15:01:58,311 INFO L226 Difference]: Without dead ends: 1153 [2022-01-28 15:01:58,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:01:58,311 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 123 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:58,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 278 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:01:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-01-28 15:01:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 767. [2022-01-28 15:01:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.3315926892950394) internal successors, (2552), 766 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) [2022-01-28 15:01:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2552 transitions. [2022-01-28 15:01:58,321 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2552 transitions. Word has length 21 [2022-01-28 15:01:58,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:58,321 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 2552 transitions. [2022-01-28 15:01:58,321 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) [2022-01-28 15:01:58,321 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2552 transitions. [2022-01-28 15:01:58,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:58,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:58,322 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] [2022-01-28 15:01:58,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (631)] Ended with exit code 0 [2022-01-28 15:01:58,522 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 [2022-01-28 15:01:58,522 INFO L402 AbstractCegarLoop]: === Iteration 643 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash 650232469, now seen corresponding path program 631 times [2022-01-28 15:01:58,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:58,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365607759] [2022-01-28 15:01:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:58,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:58,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:58,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365607759] [2022-01-28 15:01:58,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365607759] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:58,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030515766] [2022-01-28 15:01:58,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:01:58,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:58,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:58,630 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) [2022-01-28 15:01:58,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (632)] Waiting until timeout for monitored process [2022-01-28 15:01:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:58,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:58,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:58,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:01:58,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:01:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:58,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:58,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:58,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:58,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:58,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:58,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:58,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:01:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:58,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030515766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:01:58,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:01:58,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 15:01:58,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758327786] [2022-01-28 15:01:58,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:01:58,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:01:58,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:01:58,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:01:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:01:58,999 INFO L87 Difference]: Start difference. First operand 767 states and 2552 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) [2022-01-28 15:01:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:01:59,251 INFO L93 Difference]: Finished difference Result 993 states and 3201 transitions. [2022-01-28 15:01:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:01:59,251 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 [2022-01-28 15:01:59,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:01:59,253 INFO L225 Difference]: With dead ends: 993 [2022-01-28 15:01:59,253 INFO L226 Difference]: Without dead ends: 935 [2022-01-28 15:01:59,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:01:59,253 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:01:59,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 170 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:01:59,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-01-28 15:01:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 761. [2022-01-28 15:01:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.332894736842105) internal successors, (2533), 760 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) [2022-01-28 15:01:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2533 transitions. [2022-01-28 15:01:59,261 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2533 transitions. Word has length 21 [2022-01-28 15:01:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:01:59,262 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2533 transitions. [2022-01-28 15:01:59,262 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) [2022-01-28 15:01:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2533 transitions. [2022-01-28 15:01:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:01:59,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:01:59,263 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:01:59,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (632)] Ended with exit code 0 [2022-01-28 15:01:59,463 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 [2022-01-28 15:01:59,463 INFO L402 AbstractCegarLoop]: === Iteration 644 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:01:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:01:59,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1742160522, now seen corresponding path program 632 times [2022-01-28 15:01:59,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:01:59,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549518096] [2022-01-28 15:01:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:01:59,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:01:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:01:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:59,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:01:59,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549518096] [2022-01-28 15:01:59,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549518096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:01:59,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405593752] [2022-01-28 15:01:59,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:01:59,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:01:59,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:01:59,585 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) [2022-01-28 15:01:59,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (633)] Waiting until timeout for monitored process [2022-01-28 15:01:59,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:01:59,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:01:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:01:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:01:59,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:01:59,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:01:59,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:01:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:01:59,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:01:59,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:59,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:01:59,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:59,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:01:59,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:01:59,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:00,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405593752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:00,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:00,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:02:00,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395221349] [2022-01-28 15:02:00,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:00,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:02:00,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:02:00,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:02:00,020 INFO L87 Difference]: Start difference. First operand 761 states and 2533 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) [2022-01-28 15:02:00,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:00,699 INFO L93 Difference]: Finished difference Result 1308 states and 4151 transitions. [2022-01-28 15:02:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:02:00,699 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 [2022-01-28 15:02:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:00,701 INFO L225 Difference]: With dead ends: 1308 [2022-01-28 15:02:00,701 INFO L226 Difference]: Without dead ends: 1285 [2022-01-28 15:02:00,702 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 [2022-01-28 15:02:00,702 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 104 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:00,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 295 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:02:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-01-28 15:02:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 761. [2022-01-28 15:02:00,717 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) [2022-01-28 15:02:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2537 transitions. [2022-01-28 15:02:00,719 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2537 transitions. Word has length 21 [2022-01-28 15:02:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:00,719 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2537 transitions. [2022-01-28 15:02:00,719 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) [2022-01-28 15:02:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2537 transitions. [2022-01-28 15:02:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:00,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:00,720 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] [2022-01-28 15:02:00,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (633)] Ended with exit code 0 [2022-01-28 15:02:00,920 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 [2022-01-28 15:02:00,920 INFO L402 AbstractCegarLoop]: === Iteration 645 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:00,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1108692827, now seen corresponding path program 633 times [2022-01-28 15:02:00,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:00,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748500105] [2022-01-28 15:02:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:00,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:01,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748500105] [2022-01-28 15:02:01,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748500105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:01,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380042805] [2022-01-28 15:02:01,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:02:01,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:01,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:01,048 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) [2022-01-28 15:02:01,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (634)] Waiting until timeout for monitored process [2022-01-28 15:02:01,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:02:01,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:01,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:01,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:01,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:01,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:01,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:01,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:01,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:01,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:01,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:01,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:01,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:01,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380042805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:01,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:01,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:02:01,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469953977] [2022-01-28 15:02:01,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:01,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:02:01,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:02:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:02:01,492 INFO L87 Difference]: Start difference. First operand 761 states and 2537 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) [2022-01-28 15:02:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:02,054 INFO L93 Difference]: Finished difference Result 1076 states and 3433 transitions. [2022-01-28 15:02:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:02:02,054 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 [2022-01-28 15:02:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:02,056 INFO L225 Difference]: With dead ends: 1076 [2022-01-28 15:02:02,056 INFO L226 Difference]: Without dead ends: 1055 [2022-01-28 15:02:02,056 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 [2022-01-28 15:02:02,056 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:02,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 246 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:02:02,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-01-28 15:02:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 757. [2022-01-28 15:02:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.328042328042328) internal successors, (2516), 756 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) [2022-01-28 15:02:02,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2516 transitions. [2022-01-28 15:02:02,065 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2516 transitions. Word has length 21 [2022-01-28 15:02:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:02,065 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2516 transitions. [2022-01-28 15:02:02,066 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) [2022-01-28 15:02:02,066 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2516 transitions. [2022-01-28 15:02:02,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:02,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:02,066 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] [2022-01-28 15:02:02,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (634)] Ended with exit code 0 [2022-01-28 15:02:02,267 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 [2022-01-28 15:02:02,267 INFO L402 AbstractCegarLoop]: === Iteration 646 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:02,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2057471224, now seen corresponding path program 634 times [2022-01-28 15:02:02,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:02,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112536021] [2022-01-28 15:02:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:02,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:02,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:02,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112536021] [2022-01-28 15:02:02,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112536021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:02,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54471241] [2022-01-28 15:02:02,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:02:02,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:02,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:02,385 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) [2022-01-28 15:02:02,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (635)] Waiting until timeout for monitored process [2022-01-28 15:02:02,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:02:02,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:02,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:02,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:02,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:02,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:02,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:02,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:02,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:02,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:02,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:02,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:02,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54471241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:02,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:02,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:02:02,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389861927] [2022-01-28 15:02:02,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:02,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:02:02,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:02:02,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:02:02,790 INFO L87 Difference]: Start difference. First operand 757 states and 2516 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) [2022-01-28 15:02:03,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:03,300 INFO L93 Difference]: Finished difference Result 1124 states and 3621 transitions. [2022-01-28 15:02:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:02:03,301 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 [2022-01-28 15:02:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:03,302 INFO L225 Difference]: With dead ends: 1124 [2022-01-28 15:02:03,302 INFO L226 Difference]: Without dead ends: 1105 [2022-01-28 15:02:03,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:02:03,303 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:03,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 238 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:02:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-01-28 15:02:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 765. [2022-01-28 15:02:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 3.329842931937173) internal successors, (2544), 764 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) [2022-01-28 15:02:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2544 transitions. [2022-01-28 15:02:03,312 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2544 transitions. Word has length 21 [2022-01-28 15:02:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:03,312 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2544 transitions. [2022-01-28 15:02:03,313 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) [2022-01-28 15:02:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2544 transitions. [2022-01-28 15:02:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:03,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:03,313 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] [2022-01-28 15:02:03,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (635)] Ended with exit code 0 [2022-01-28 15:02:03,514 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 [2022-01-28 15:02:03,514 INFO L402 AbstractCegarLoop]: === Iteration 647 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:03,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:03,514 INFO L85 PathProgramCache]: Analyzing trace with hash 190141128, now seen corresponding path program 635 times [2022-01-28 15:02:03,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:03,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664106431] [2022-01-28 15:02:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:03,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:03,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664106431] [2022-01-28 15:02:03,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664106431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709341232] [2022-01-28 15:02:03,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:02:03,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:03,633 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) [2022-01-28 15:02:03,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (636)] Waiting until timeout for monitored process [2022-01-28 15:02:03,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:02:03,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:02:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:03,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:03,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:03,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:04,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:04,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:04,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:04,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:04,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:04,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709341232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:04,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:04,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:02:04,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830777593] [2022-01-28 15:02:04,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:04,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:02:04,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:02:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:02:04,224 INFO L87 Difference]: Start difference. First operand 765 states and 2544 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) [2022-01-28 15:02:04,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:04,946 INFO L93 Difference]: Finished difference Result 1282 states and 4071 transitions. [2022-01-28 15:02:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:02:04,946 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 [2022-01-28 15:02:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:04,948 INFO L225 Difference]: With dead ends: 1282 [2022-01-28 15:02:04,948 INFO L226 Difference]: Without dead ends: 1225 [2022-01-28 15:02:04,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 15:02:04,948 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:04,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 289 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:02:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-01-28 15:02:04,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 761. [2022-01-28 15:02:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 3.3263157894736843) internal successors, (2528), 760 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 2528 transitions. [2022-01-28 15:02:04,958 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 2528 transitions. Word has length 21 [2022-01-28 15:02:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:04,958 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 2528 transitions. [2022-01-28 15:02:04,958 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) [2022-01-28 15:02:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 2528 transitions. [2022-01-28 15:02:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:04,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:04,959 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:04,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (636)] Ended with exit code 0 [2022-01-28 15:02:05,159 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 [2022-01-28 15:02:05,160 INFO L402 AbstractCegarLoop]: === Iteration 648 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash 905292798, now seen corresponding path program 636 times [2022-01-28 15:02:05,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:05,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568453287] [2022-01-28 15:02:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:05,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:05,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:05,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568453287] [2022-01-28 15:02:05,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568453287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:05,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013056170] [2022-01-28 15:02:05,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:02:05,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:05,264 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) [2022-01-28 15:02:05,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (637)] Waiting until timeout for monitored process [2022-01-28 15:02:05,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:02:05,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:05,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:05,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:05,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:05,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:05,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:05,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:05,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:05,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:05,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:05,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:05,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:05,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:05,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:05,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:05,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:05,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013056170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:05,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:05,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:02:05,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549491070] [2022-01-28 15:02:05,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:05,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:02:05,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:05,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:02:05,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:02:05,732 INFO L87 Difference]: Start difference. First operand 761 states and 2528 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) [2022-01-28 15:02:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:05,917 INFO L93 Difference]: Finished difference Result 923 states and 3024 transitions. [2022-01-28 15:02:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:02:05,917 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 [2022-01-28 15:02:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:05,918 INFO L225 Difference]: With dead ends: 923 [2022-01-28 15:02:05,918 INFO L226 Difference]: Without dead ends: 904 [2022-01-28 15:02:05,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:02:05,919 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:05,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 129 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 264 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2022-01-28 15:02:05,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-28 15:02:05,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 771. [2022-01-28 15:02:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.32987012987013) internal successors, (2564), 770 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2564 transitions. [2022-01-28 15:02:05,928 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2564 transitions. Word has length 21 [2022-01-28 15:02:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:05,928 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 2564 transitions. [2022-01-28 15:02:05,928 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) [2022-01-28 15:02:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2564 transitions. [2022-01-28 15:02:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:05,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:05,929 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:05,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (637)] Ended with exit code 0 [2022-01-28 15:02:06,129 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 [2022-01-28 15:02:06,129 INFO L402 AbstractCegarLoop]: === Iteration 649 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:06,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1492208400, now seen corresponding path program 637 times [2022-01-28 15:02:06,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:06,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163226672] [2022-01-28 15:02:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:06,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:06,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:06,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163226672] [2022-01-28 15:02:06,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163226672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:06,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834378842] [2022-01-28 15:02:06,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:02:06,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:06,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:06,238 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) [2022-01-28 15:02:06,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (638)] Waiting until timeout for monitored process [2022-01-28 15:02:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:06,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:06,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:06,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:06,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:06,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:06,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:06,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:06,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:06,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:06,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:06,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:06,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834378842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:06,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:06,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:02:06,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348690318] [2022-01-28 15:02:06,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:06,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:02:06,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:02:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:02:06,645 INFO L87 Difference]: Start difference. First operand 771 states and 2564 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) [2022-01-28 15:02:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:07,083 INFO L93 Difference]: Finished difference Result 1073 states and 3438 transitions. [2022-01-28 15:02:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:02:07,083 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 [2022-01-28 15:02:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:07,085 INFO L225 Difference]: With dead ends: 1073 [2022-01-28 15:02:07,085 INFO L226 Difference]: Without dead ends: 1035 [2022-01-28 15:02:07,085 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 [2022-01-28 15:02:07,085 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:07,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 255 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:02:07,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-01-28 15:02:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 758. [2022-01-28 15:02:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.3289299867899604) internal successors, (2520), 757 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) [2022-01-28 15:02:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2520 transitions. [2022-01-28 15:02:07,094 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2520 transitions. Word has length 21 [2022-01-28 15:02:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:07,094 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2520 transitions. [2022-01-28 15:02:07,094 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) [2022-01-28 15:02:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2520 transitions. [2022-01-28 15:02:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:07,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:07,095 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:07,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (638)] Forceful destruction successful, exit code 0 [2022-01-28 15:02:07,295 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 [2022-01-28 15:02:07,296 INFO L402 AbstractCegarLoop]: === Iteration 650 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2094312809, now seen corresponding path program 638 times [2022-01-28 15:02:07,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190645912] [2022-01-28 15:02:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:07,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:07,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:07,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190645912] [2022-01-28 15:02:07,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190645912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:07,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912018684] [2022-01-28 15:02:07,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:02:07,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:07,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:07,393 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) [2022-01-28 15:02:07,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (639)] Waiting until timeout for monitored process [2022-01-28 15:02:07,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:02:07,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:07,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:07,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:07,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:07,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:07,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:07,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:07,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:07,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:07,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:07,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:07,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:07,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:07,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912018684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:07,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:07,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:02:07,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406921187] [2022-01-28 15:02:07,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:07,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:02:07,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:07,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:02:07,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:02:07,804 INFO L87 Difference]: Start difference. First operand 758 states and 2520 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) [2022-01-28 15:02:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:08,341 INFO L93 Difference]: Finished difference Result 1188 states and 3751 transitions. [2022-01-28 15:02:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:02:08,341 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 [2022-01-28 15:02:08,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:08,343 INFO L225 Difference]: With dead ends: 1188 [2022-01-28 15:02:08,343 INFO L226 Difference]: Without dead ends: 1134 [2022-01-28 15:02:08,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:02:08,343 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:08,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 250 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:02:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-01-28 15:02:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 780. [2022-01-28 15:02:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3568677792041077) internal successors, (2615), 779 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2615 transitions. [2022-01-28 15:02:08,360 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2615 transitions. Word has length 21 [2022-01-28 15:02:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:08,360 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2615 transitions. [2022-01-28 15:02:08,360 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) [2022-01-28 15:02:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2615 transitions. [2022-01-28 15:02:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:08,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:08,361 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:08,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (639)] Ended with exit code 0 [2022-01-28 15:02:08,561 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 [2022-01-28 15:02:08,561 INFO L402 AbstractCegarLoop]: === Iteration 651 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:08,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1345097759, now seen corresponding path program 639 times [2022-01-28 15:02:08,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:08,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883414751] [2022-01-28 15:02:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:08,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:08,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:08,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883414751] [2022-01-28 15:02:08,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883414751] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:08,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002182055] [2022-01-28 15:02:08,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:02:08,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:08,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:08,658 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) [2022-01-28 15:02:08,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (640)] Waiting until timeout for monitored process [2022-01-28 15:02:08,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:02:08,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:08,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:08,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:08,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:08,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:08,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:08,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:08,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:08,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:08,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:08,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002182055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:08,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:08,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 20 [2022-01-28 15:02:08,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754101806] [2022-01-28 15:02:08,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:08,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:02:08,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:08,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:02:08,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:02:08,989 INFO L87 Difference]: Start difference. First operand 780 states and 2615 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) [2022-01-28 15:02:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:09,237 INFO L93 Difference]: Finished difference Result 955 states and 3102 transitions. [2022-01-28 15:02:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:02:09,237 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 [2022-01-28 15:02:09,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:09,238 INFO L225 Difference]: With dead ends: 955 [2022-01-28 15:02:09,238 INFO L226 Difference]: Without dead ends: 883 [2022-01-28 15:02:09,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:02:09,238 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:09,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 178 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:02:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-28 15:02:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 774. [2022-01-28 15:02:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.3505821474773607) internal successors, (2590), 773 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2590 transitions. [2022-01-28 15:02:09,247 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2590 transitions. Word has length 21 [2022-01-28 15:02:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:09,247 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2590 transitions. [2022-01-28 15:02:09,247 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) [2022-01-28 15:02:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2590 transitions. [2022-01-28 15:02:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:09,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:09,248 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] [2022-01-28 15:02:09,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (640)] Ended with exit code 0 [2022-01-28 15:02:09,448 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 [2022-01-28 15:02:09,449 INFO L402 AbstractCegarLoop]: === Iteration 652 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:09,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2131151779, now seen corresponding path program 640 times [2022-01-28 15:02:09,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:09,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475219265] [2022-01-28 15:02:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:09,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:09,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:09,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475219265] [2022-01-28 15:02:09,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475219265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:09,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613813611] [2022-01-28 15:02:09,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:02:09,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:09,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:09,551 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) [2022-01-28 15:02:09,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (641)] Waiting until timeout for monitored process [2022-01-28 15:02:09,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:02:09,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:09,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:09,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:09,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:09,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:09,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:09,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:09,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:09,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:09,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:09,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:09,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:09,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613813611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:09,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:09,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:02:09,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306584257] [2022-01-28 15:02:09,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:09,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:02:09,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:02:09,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:02:09,975 INFO L87 Difference]: Start difference. First operand 774 states and 2590 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) [2022-01-28 15:02:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:10,329 INFO L93 Difference]: Finished difference Result 1087 states and 3470 transitions. [2022-01-28 15:02:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:02:10,330 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 [2022-01-28 15:02:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:10,331 INFO L225 Difference]: With dead ends: 1087 [2022-01-28 15:02:10,331 INFO L226 Difference]: Without dead ends: 1045 [2022-01-28 15:02:10,331 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 [2022-01-28 15:02:10,331 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 96 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:10,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 164 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:02:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2022-01-28 15:02:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 763. [2022-01-28 15:02:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.341207349081365) internal successors, (2546), 762 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2546 transitions. [2022-01-28 15:02:10,341 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2546 transitions. Word has length 21 [2022-01-28 15:02:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:10,341 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2546 transitions. [2022-01-28 15:02:10,341 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) [2022-01-28 15:02:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2546 transitions. [2022-01-28 15:02:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:10,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:10,342 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:10,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (641)] Ended with exit code 0 [2022-01-28 15:02:10,542 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 [2022-01-28 15:02:10,542 INFO L402 AbstractCegarLoop]: === Iteration 653 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash -893538050, now seen corresponding path program 641 times [2022-01-28 15:02:10,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:10,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808344026] [2022-01-28 15:02:10,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:10,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:10,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:10,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808344026] [2022-01-28 15:02:10,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808344026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:10,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134340398] [2022-01-28 15:02:10,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:02:10,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:10,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:10,653 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) [2022-01-28 15:02:10,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (642)] Waiting until timeout for monitored process [2022-01-28 15:02:10,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:02:10,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:10,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:02:10,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:10,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:10,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:10,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:10,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:10,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:10,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:11,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:11,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:11,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:11,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:11,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:11,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:11,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:11,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134340398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:11,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:11,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2022-01-28 15:02:11,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572996116] [2022-01-28 15:02:11,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:11,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 15:02:11,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:11,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 15:02:11,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:02:11,350 INFO L87 Difference]: Start difference. First operand 763 states and 2546 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) [2022-01-28 15:02:12,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:12,120 INFO L93 Difference]: Finished difference Result 1152 states and 3669 transitions. [2022-01-28 15:02:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:02:12,121 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 [2022-01-28 15:02:12,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:12,122 INFO L225 Difference]: With dead ends: 1152 [2022-01-28 15:02:12,122 INFO L226 Difference]: Without dead ends: 1083 [2022-01-28 15:02:12,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:02:12,123 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 141 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:12,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 336 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 981 Invalid, 0 Unknown, 107 Unchecked, 0.4s Time] [2022-01-28 15:02:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-01-28 15:02:12,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 784. [2022-01-28 15:02:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.3652618135376757) internal successors, (2635), 783 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2635 transitions. [2022-01-28 15:02:12,133 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2635 transitions. Word has length 21 [2022-01-28 15:02:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:12,133 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2635 transitions. [2022-01-28 15:02:12,133 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) [2022-01-28 15:02:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2635 transitions. [2022-01-28 15:02:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:12,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:12,134 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:12,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (642)] Ended with exit code 0 [2022-01-28 15:02:12,334 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 [2022-01-28 15:02:12,334 INFO L402 AbstractCegarLoop]: === Iteration 654 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:12,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1957315299, now seen corresponding path program 642 times [2022-01-28 15:02:12,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:12,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015174958] [2022-01-28 15:02:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:12,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:12,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:12,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015174958] [2022-01-28 15:02:12,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015174958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:12,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205106947] [2022-01-28 15:02:12,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:02:12,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:12,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:12,456 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) [2022-01-28 15:02:12,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (643)] Waiting until timeout for monitored process [2022-01-28 15:02:12,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:02:12,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:12,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:12,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:12,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:12,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:12,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:12,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:12,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:12,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:12,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:12,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:12,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:12,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:12,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205106947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:12,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:12,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:02:12,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548783930] [2022-01-28 15:02:12,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:12,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:02:12,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:12,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:02:12,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:02:12,891 INFO L87 Difference]: Start difference. First operand 784 states and 2635 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) [2022-01-28 15:02:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:13,319 INFO L93 Difference]: Finished difference Result 1087 states and 3508 transitions. [2022-01-28 15:02:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:02:13,319 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 [2022-01-28 15:02:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:13,320 INFO L225 Difference]: With dead ends: 1087 [2022-01-28 15:02:13,320 INFO L226 Difference]: Without dead ends: 1066 [2022-01-28 15:02:13,320 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 [2022-01-28 15:02:13,321 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:13,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 230 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:02:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-01-28 15:02:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 778. [2022-01-28 15:02:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 3.3616473616473614) internal successors, (2612), 777 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) [2022-01-28 15:02:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2612 transitions. [2022-01-28 15:02:13,330 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2612 transitions. Word has length 21 [2022-01-28 15:02:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:13,330 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 2612 transitions. [2022-01-28 15:02:13,330 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) [2022-01-28 15:02:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2612 transitions. [2022-01-28 15:02:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:13,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:13,331 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:13,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (643)] Ended with exit code 0 [2022-01-28 15:02:13,531 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 [2022-01-28 15:02:13,532 INFO L402 AbstractCegarLoop]: === Iteration 655 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash -790027896, now seen corresponding path program 643 times [2022-01-28 15:02:13,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:13,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537281246] [2022-01-28 15:02:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:13,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:13,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537281246] [2022-01-28 15:02:13,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537281246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755128655] [2022-01-28 15:02:13,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:02:13,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:13,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:13,651 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) [2022-01-28 15:02:13,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (644)] Waiting until timeout for monitored process [2022-01-28 15:02:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:13,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:13,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:13,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:13,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:13,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:13,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:13,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:13,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:13,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:14,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:14,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:14,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:14,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:14,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:14,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:14,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755128655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:14,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:14,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:02:14,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474362071] [2022-01-28 15:02:14,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:14,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:02:14,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:14,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:02:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:02:14,214 INFO L87 Difference]: Start difference. First operand 778 states and 2612 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) [2022-01-28 15:02:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:14,448 INFO L93 Difference]: Finished difference Result 970 states and 3190 transitions. [2022-01-28 15:02:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:02:14,449 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 [2022-01-28 15:02:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:14,450 INFO L225 Difference]: With dead ends: 970 [2022-01-28 15:02:14,450 INFO L226 Difference]: Without dead ends: 951 [2022-01-28 15:02:14,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:02:14,450 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:14,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 160 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 374 Invalid, 0 Unknown, 298 Unchecked, 0.1s Time] [2022-01-28 15:02:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-01-28 15:02:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 782. [2022-01-28 15:02:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.3649167733674776) internal successors, (2628), 781 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2628 transitions. [2022-01-28 15:02:14,459 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2628 transitions. Word has length 21 [2022-01-28 15:02:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:14,459 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2628 transitions. [2022-01-28 15:02:14,459 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) [2022-01-28 15:02:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2628 transitions. [2022-01-28 15:02:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:14,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:14,460 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:14,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (644)] Forceful destruction successful, exit code 0 [2022-01-28 15:02:14,660 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 [2022-01-28 15:02:14,660 INFO L402 AbstractCegarLoop]: === Iteration 656 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:14,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2044959888, now seen corresponding path program 644 times [2022-01-28 15:02:14,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:14,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707258310] [2022-01-28 15:02:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:14,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:14,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:14,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707258310] [2022-01-28 15:02:14,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707258310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:14,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569111061] [2022-01-28 15:02:14,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:02:14,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:14,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:14,773 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) [2022-01-28 15:02:14,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (645)] Waiting until timeout for monitored process [2022-01-28 15:02:14,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:02:14,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:14,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:14,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:14,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:15,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:15,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:15,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:15,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:15,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:15,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:15,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:15,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:15,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:15,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:15,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:15,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569111061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:15,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:15,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:02:15,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927441290] [2022-01-28 15:02:15,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:15,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:02:15,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:02:15,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:02:15,439 INFO L87 Difference]: Start difference. First operand 782 states and 2628 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) [2022-01-28 15:02:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:15,724 INFO L93 Difference]: Finished difference Result 1021 states and 3304 transitions. [2022-01-28 15:02:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:02:15,730 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 [2022-01-28 15:02:15,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:15,731 INFO L225 Difference]: With dead ends: 1021 [2022-01-28 15:02:15,731 INFO L226 Difference]: Without dead ends: 983 [2022-01-28 15:02:15,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:02:15,732 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:15,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 187 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 490 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-01-28 15:02:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-01-28 15:02:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 794. [2022-01-28 15:02:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 3.360655737704918) internal successors, (2665), 793 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2665 transitions. [2022-01-28 15:02:15,748 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2665 transitions. Word has length 21 [2022-01-28 15:02:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:15,748 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 2665 transitions. [2022-01-28 15:02:15,748 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) [2022-01-28 15:02:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2665 transitions. [2022-01-28 15:02:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:15,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:15,749 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:15,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (645)] Ended with exit code 0 [2022-01-28 15:02:15,949 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 [2022-01-28 15:02:15,949 INFO L402 AbstractCegarLoop]: === Iteration 657 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:15,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:15,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1574625480, now seen corresponding path program 645 times [2022-01-28 15:02:15,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:15,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730305061] [2022-01-28 15:02:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:15,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:16,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:16,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730305061] [2022-01-28 15:02:16,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730305061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:16,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634124373] [2022-01-28 15:02:16,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:02:16,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:16,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:16,062 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) [2022-01-28 15:02:16,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (646)] Waiting until timeout for monitored process [2022-01-28 15:02:16,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:02:16,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:16,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:16,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:16,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:16,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:16,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:16,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:16,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:16,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:16,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:16,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634124373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:16,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:16,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2022-01-28 15:02:16,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532785207] [2022-01-28 15:02:16,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:16,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:02:16,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:16,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:02:16,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:02:16,491 INFO L87 Difference]: Start difference. First operand 794 states and 2665 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) [2022-01-28 15:02:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:16,954 INFO L93 Difference]: Finished difference Result 1155 states and 3704 transitions. [2022-01-28 15:02:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:02:16,954 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 [2022-01-28 15:02:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:16,956 INFO L225 Difference]: With dead ends: 1155 [2022-01-28 15:02:16,956 INFO L226 Difference]: Without dead ends: 1117 [2022-01-28 15:02:16,956 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 [2022-01-28 15:02:16,956 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:16,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 290 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:02:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-01-28 15:02:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 783. [2022-01-28 15:02:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.3618925831202047) internal successors, (2629), 782 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2629 transitions. [2022-01-28 15:02:16,966 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2629 transitions. Word has length 21 [2022-01-28 15:02:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:16,967 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 2629 transitions. [2022-01-28 15:02:16,967 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) [2022-01-28 15:02:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2629 transitions. [2022-01-28 15:02:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:16,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:16,968 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:16,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (646)] Forceful destruction successful, exit code 0 [2022-01-28 15:02:17,168 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 [2022-01-28 15:02:17,168 INFO L402 AbstractCegarLoop]: === Iteration 658 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1954470160, now seen corresponding path program 646 times [2022-01-28 15:02:17,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:17,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452005433] [2022-01-28 15:02:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:17,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:17,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452005433] [2022-01-28 15:02:17,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452005433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835510361] [2022-01-28 15:02:17,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:02:17,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:17,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:17,277 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) [2022-01-28 15:02:17,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (647)] Waiting until timeout for monitored process [2022-01-28 15:02:17,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:02:17,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:17,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:17,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:17,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:17,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:17,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:17,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:02:17,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:17,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:17,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:17,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:17,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:17,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:17,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:17,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:17,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835510361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:17,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:17,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 21 [2022-01-28 15:02:17,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396316583] [2022-01-28 15:02:17,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:17,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:02:17,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:02:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:02:17,910 INFO L87 Difference]: Start difference. First operand 783 states and 2629 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) [2022-01-28 15:02:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:18,241 INFO L93 Difference]: Finished difference Result 1094 states and 3509 transitions. [2022-01-28 15:02:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:02:18,242 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 [2022-01-28 15:02:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:18,243 INFO L225 Difference]: With dead ends: 1094 [2022-01-28 15:02:18,243 INFO L226 Difference]: Without dead ends: 1048 [2022-01-28 15:02:18,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:02:18,243 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:18,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 175 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 382 Invalid, 0 Unknown, 250 Unchecked, 0.2s Time] [2022-01-28 15:02:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-01-28 15:02:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 785. [2022-01-28 15:02:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.372448979591837) internal successors, (2644), 784 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2644 transitions. [2022-01-28 15:02:18,253 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2644 transitions. Word has length 21 [2022-01-28 15:02:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:18,253 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2644 transitions. [2022-01-28 15:02:18,253 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) [2022-01-28 15:02:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2644 transitions. [2022-01-28 15:02:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:18,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:18,254 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] [2022-01-28 15:02:18,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (647)] Ended with exit code 0 [2022-01-28 15:02:18,454 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 [2022-01-28 15:02:18,454 INFO L402 AbstractCegarLoop]: === Iteration 659 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1030624922, now seen corresponding path program 647 times [2022-01-28 15:02:18,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:18,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668485487] [2022-01-28 15:02:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:18,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:18,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:18,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668485487] [2022-01-28 15:02:18,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668485487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:18,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384012988] [2022-01-28 15:02:18,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:02:18,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:18,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:18,545 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) [2022-01-28 15:02:18,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (648)] Waiting until timeout for monitored process [2022-01-28 15:02:18,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:02:18,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:18,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:02:18,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:18,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:18,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:18,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:18,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:18,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:18,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:19,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:19,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:19,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:19,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384012988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:19,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:19,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-01-28 15:02:19,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538385196] [2022-01-28 15:02:19,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:19,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 15:02:19,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:19,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 15:02:19,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:02:19,097 INFO L87 Difference]: Start difference. First operand 785 states and 2644 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) [2022-01-28 15:02:19,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:19,755 INFO L93 Difference]: Finished difference Result 1200 states and 3885 transitions. [2022-01-28 15:02:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:02:19,755 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 [2022-01-28 15:02:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:19,757 INFO L225 Difference]: With dead ends: 1200 [2022-01-28 15:02:19,757 INFO L226 Difference]: Without dead ends: 1162 [2022-01-28 15:02:19,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:02:19,757 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:19,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 326 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 967 Invalid, 0 Unknown, 110 Unchecked, 0.4s Time] [2022-01-28 15:02:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-01-28 15:02:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 802. [2022-01-28 15:02:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.3707865168539324) internal successors, (2700), 801 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) [2022-01-28 15:02:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2700 transitions. [2022-01-28 15:02:19,768 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2700 transitions. Word has length 21 [2022-01-28 15:02:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:19,768 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 2700 transitions. [2022-01-28 15:02:19,768 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) [2022-01-28 15:02:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2700 transitions. [2022-01-28 15:02:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:19,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:19,769 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] [2022-01-28 15:02:19,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (648)] Forceful destruction successful, exit code 0 [2022-01-28 15:02:19,969 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 [2022-01-28 15:02:19,969 INFO L402 AbstractCegarLoop]: === Iteration 660 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1016730022, now seen corresponding path program 648 times [2022-01-28 15:02:19,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:19,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749900919] [2022-01-28 15:02:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:19,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:20,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:20,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749900919] [2022-01-28 15:02:20,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749900919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:20,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306421733] [2022-01-28 15:02:20,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:02:20,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:20,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:20,079 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) [2022-01-28 15:02:20,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (649)] Waiting until timeout for monitored process [2022-01-28 15:02:20,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:02:20,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:20,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:20,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:20,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:20,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:20,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:20,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:20,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:20,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:20,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:20,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:20,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306421733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:20,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:20,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 15:02:20,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247078029] [2022-01-28 15:02:20,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:20,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:02:20,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:20,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:02:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:02:20,467 INFO L87 Difference]: Start difference. First operand 802 states and 2700 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) [2022-01-28 15:02:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:20,986 INFO L93 Difference]: Finished difference Result 1180 states and 3819 transitions. [2022-01-28 15:02:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:02:20,987 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 [2022-01-28 15:02:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:20,989 INFO L225 Difference]: With dead ends: 1180 [2022-01-28 15:02:20,989 INFO L226 Difference]: Without dead ends: 1161 [2022-01-28 15:02:20,989 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 [2022-01-28 15:02:20,989 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 97 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:20,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 234 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:02:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-01-28 15:02:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 802. [2022-01-28 15:02:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.362047440699126) internal successors, (2693), 801 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2693 transitions. [2022-01-28 15:02:21,000 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2693 transitions. Word has length 21 [2022-01-28 15:02:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:21,000 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 2693 transitions. [2022-01-28 15:02:21,000 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) [2022-01-28 15:02:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2693 transitions. [2022-01-28 15:02:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:21,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:21,001 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:21,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (649)] Ended with exit code 0 [2022-01-28 15:02:21,201 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 [2022-01-28 15:02:21,201 INFO L402 AbstractCegarLoop]: === Iteration 661 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:21,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:21,202 INFO L85 PathProgramCache]: Analyzing trace with hash -301578352, now seen corresponding path program 649 times [2022-01-28 15:02:21,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:21,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745313128] [2022-01-28 15:02:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:21,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:21,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:21,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745313128] [2022-01-28 15:02:21,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745313128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:21,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859266092] [2022-01-28 15:02:21,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:02:21,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:21,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:21,309 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) [2022-01-28 15:02:21,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (650)] Waiting until timeout for monitored process [2022-01-28 15:02:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:21,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:21,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:21,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:21,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:21,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:21,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:21,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:21,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:21,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:21,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:21,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:21,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859266092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:21,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:21,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 20 [2022-01-28 15:02:21,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845777051] [2022-01-28 15:02:21,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:21,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:02:21,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:02:21,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:02:21,680 INFO L87 Difference]: Start difference. First operand 802 states and 2693 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) [2022-01-28 15:02:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:22,160 INFO L93 Difference]: Finished difference Result 1075 states and 3507 transitions. [2022-01-28 15:02:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:02:22,161 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 [2022-01-28 15:02:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:22,162 INFO L225 Difference]: With dead ends: 1075 [2022-01-28 15:02:22,162 INFO L226 Difference]: Without dead ends: 1056 [2022-01-28 15:02:22,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:02:22,162 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:22,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 267 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:02:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-01-28 15:02:22,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 796. [2022-01-28 15:02:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.362264150943396) internal successors, (2673), 795 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2673 transitions. [2022-01-28 15:02:22,172 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2673 transitions. Word has length 21 [2022-01-28 15:02:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:22,172 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 2673 transitions. [2022-01-28 15:02:22,172 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) [2022-01-28 15:02:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2673 transitions. [2022-01-28 15:02:22,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:22,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:22,173 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:22,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (650)] Ended with exit code 0 [2022-01-28 15:02:22,373 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 [2022-01-28 15:02:22,374 INFO L402 AbstractCegarLoop]: === Iteration 662 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:22,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:22,374 INFO L85 PathProgramCache]: Analyzing trace with hash -224803302, now seen corresponding path program 650 times [2022-01-28 15:02:22,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:22,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75159905] [2022-01-28 15:02:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:22,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:22,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:22,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75159905] [2022-01-28 15:02:22,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75159905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:22,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404783252] [2022-01-28 15:02:22,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:02:22,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:22,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:22,469 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) [2022-01-28 15:02:22,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (651)] Waiting until timeout for monitored process [2022-01-28 15:02:22,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:02:22,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:22,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:22,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:22,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:22,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:22,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:22,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:22,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:22,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:22,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:22,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:22,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404783252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:22,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:22,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-28 15:02:22,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883594070] [2022-01-28 15:02:22,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:22,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:02:22,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:02:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:02:22,795 INFO L87 Difference]: Start difference. First operand 796 states and 2673 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) [2022-01-28 15:02:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:23,185 INFO L93 Difference]: Finished difference Result 1147 states and 3726 transitions. [2022-01-28 15:02:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:02:23,185 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 [2022-01-28 15:02:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:23,187 INFO L225 Difference]: With dead ends: 1147 [2022-01-28 15:02:23,187 INFO L226 Difference]: Without dead ends: 1128 [2022-01-28 15:02:23,187 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 [2022-01-28 15:02:23,187 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:23,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 209 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:02:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-01-28 15:02:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 796. [2022-01-28 15:02:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.362264150943396) internal successors, (2673), 795 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2673 transitions. [2022-01-28 15:02:23,197 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2673 transitions. Word has length 21 [2022-01-28 15:02:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:23,197 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 2673 transitions. [2022-01-28 15:02:23,197 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) [2022-01-28 15:02:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2673 transitions. [2022-01-28 15:02:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:23,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:23,198 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:23,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (651)] Ended with exit code 0 [2022-01-28 15:02:23,398 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 [2022-01-28 15:02:23,398 INFO L402 AbstractCegarLoop]: === Iteration 663 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:23,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:23,398 INFO L85 PathProgramCache]: Analyzing trace with hash 285713741, now seen corresponding path program 651 times [2022-01-28 15:02:23,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:23,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544826175] [2022-01-28 15:02:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:23,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:23,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:23,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544826175] [2022-01-28 15:02:23,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544826175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:23,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836800397] [2022-01-28 15:02:23,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:02:23,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:23,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:23,491 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) [2022-01-28 15:02:23,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (652)] Waiting until timeout for monitored process [2022-01-28 15:02:23,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:02:23,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:23,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:23,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:23,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:23,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:23,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:23,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:23,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:23,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:23,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:23,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:23,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836800397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:23,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:23,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-28 15:02:23,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102860525] [2022-01-28 15:02:23,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:23,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:02:23,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:02:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:02:23,833 INFO L87 Difference]: Start difference. First operand 796 states and 2673 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) [2022-01-28 15:02:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:24,632 INFO L93 Difference]: Finished difference Result 1617 states and 5022 transitions. [2022-01-28 15:02:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 15:02:24,632 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 [2022-01-28 15:02:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:24,635 INFO L225 Difference]: With dead ends: 1617 [2022-01-28 15:02:24,635 INFO L226 Difference]: Without dead ends: 1563 [2022-01-28 15:02:24,635 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 [2022-01-28 15:02:24,635 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 133 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:24,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 311 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:02:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-01-28 15:02:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 842. [2022-01-28 15:02:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.4007134363852556) internal successors, (2860), 841 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2860 transitions. [2022-01-28 15:02:24,647 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2860 transitions. Word has length 21 [2022-01-28 15:02:24,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:24,647 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2860 transitions. [2022-01-28 15:02:24,647 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) [2022-01-28 15:02:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2860 transitions. [2022-01-28 15:02:24,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:24,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:24,648 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:24,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (652)] Ended with exit code 0 [2022-01-28 15:02:24,848 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 [2022-01-28 15:02:24,849 INFO L402 AbstractCegarLoop]: === Iteration 664 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash -569842987, now seen corresponding path program 652 times [2022-01-28 15:02:24,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:24,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521242913] [2022-01-28 15:02:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:24,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:24,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:24,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521242913] [2022-01-28 15:02:24,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521242913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:24,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4776888] [2022-01-28 15:02:24,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:02:24,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:24,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:24,929 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) [2022-01-28 15:02:24,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (653)] Waiting until timeout for monitored process [2022-01-28 15:02:24,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:02:24,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:24,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:24,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-01-28 15:02:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:25,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:25,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:25,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:25,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:25,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:25,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:25,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4776888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:25,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:25,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 17 [2022-01-28 15:02:25,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163714553] [2022-01-28 15:02:25,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:25,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:02:25,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:02:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:02:25,217 INFO L87 Difference]: Start difference. First operand 842 states and 2860 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) [2022-01-28 15:02:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:25,525 INFO L93 Difference]: Finished difference Result 1224 states and 3929 transitions. [2022-01-28 15:02:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:02:25,525 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 [2022-01-28 15:02:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:25,527 INFO L225 Difference]: With dead ends: 1224 [2022-01-28 15:02:25,527 INFO L226 Difference]: Without dead ends: 1130 [2022-01-28 15:02:25,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:02:25,527 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 88 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:25,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 196 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:02:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-01-28 15:02:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 836. [2022-01-28 15:02:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.3832335329341316) internal successors, (2825), 835 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2825 transitions. [2022-01-28 15:02:25,538 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2825 transitions. Word has length 21 [2022-01-28 15:02:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:25,538 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 2825 transitions. [2022-01-28 15:02:25,538 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) [2022-01-28 15:02:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2825 transitions. [2022-01-28 15:02:25,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:25,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:25,539 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] [2022-01-28 15:02:25,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (653)] Ended with exit code 0 [2022-01-28 15:02:25,739 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 [2022-01-28 15:02:25,739 INFO L402 AbstractCegarLoop]: === Iteration 665 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash 216211033, now seen corresponding path program 653 times [2022-01-28 15:02:25,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:25,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777569183] [2022-01-28 15:02:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:25,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:25,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:25,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777569183] [2022-01-28 15:02:25,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777569183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:25,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397057354] [2022-01-28 15:02:25,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:02:25,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:25,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:25,825 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) [2022-01-28 15:02:25,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (654)] Waiting until timeout for monitored process [2022-01-28 15:02:25,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:02:25,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:25,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 15:02:25,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:25,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:25,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:26,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:26,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:26,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:26,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:26,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 15:02:26,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:26,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 15:02:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:26,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397057354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:26,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:26,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-01-28 15:02:26,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040101245] [2022-01-28 15:02:26,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:26,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:02:26,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:02:26,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:02:26,234 INFO L87 Difference]: Start difference. First operand 836 states and 2825 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) [2022-01-28 15:02:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:02:27,662 INFO L93 Difference]: Finished difference Result 1921 states and 5822 transitions. [2022-01-28 15:02:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 15:02:27,663 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 [2022-01-28 15:02:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:02:27,665 INFO L225 Difference]: With dead ends: 1921 [2022-01-28 15:02:27,666 INFO L226 Difference]: Without dead ends: 1696 [2022-01-28 15:02:27,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 15:02:27,666 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 234 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:27,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 346 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:02:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-01-28 15:02:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 839. [2022-01-28 15:02:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.384248210023866) internal successors, (2836), 838 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:02:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2836 transitions. [2022-01-28 15:02:27,679 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2836 transitions. Word has length 21 [2022-01-28 15:02:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:02:27,679 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 2836 transitions. [2022-01-28 15:02:27,679 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) [2022-01-28 15:02:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2836 transitions. [2022-01-28 15:02:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:02:27,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:02:27,680 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:02:27,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (654)] Ended with exit code 0 [2022-01-28 15:02:27,880 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 [2022-01-28 15:02:27,880 INFO L402 AbstractCegarLoop]: === Iteration 666 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:02:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:02:27,880 INFO L85 PathProgramCache]: Analyzing trace with hash -877880555, now seen corresponding path program 654 times [2022-01-28 15:02:27,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:02:27,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19281902] [2022-01-28 15:02:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:02:27,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:02:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:02:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:27,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:02:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19281902] [2022-01-28 15:02:27,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19281902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:02:27,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269683195] [2022-01-28 15:02:27,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:02:27,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:02:27,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:02:27,961 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) [2022-01-28 15:02:27,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (655)] Waiting until timeout for monitored process [2022-01-28 15:02:27,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:02:27,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:02:27,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:02:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:02:28,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:28,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-01-28 15:02:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:28,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:02:28,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:28,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:28,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:28,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:28,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:02:28,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-01-28 15:02:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:02:28,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269683195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:02:28,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:02:28,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2022-01-28 15:02:28,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479222883] [2022-01-28 15:02:28,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:02:28,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:02:28,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:02:28,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:02:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:02:28,276 INFO L87 Difference]: Start difference. First operand 839 states and 2836 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) Received shutdown request... [2022-01-28 15:02:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:02:28,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:02:28,590 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:02:28,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 131 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:02:28,591 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-28 15:02:28,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (655)] Ended with exit code 0 [2022-01-28 15:02:28,610 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 [2022-01-28 15:02:28,612 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (655)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 15:02:28,791 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 [2022-01-28 15:02:28,792 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (839states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (416 states constructed, input type IntersectNwa). [2022-01-28 15:02:28,794 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-28 15:02:28,794 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-28 15:02:28,794 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-28 15:02:28,796 INFO L732 BasicCegarLoop]: Path program histogram: [654, 6, 3, 2, 1] [2022-01-28 15:02:28,798 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 15:02:28,798 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 15:02:28,800 INFO L202 PluginConnector]: Adding new model chromosome-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 03:02:28 BasicIcfg [2022-01-28 15:02:28,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 15:02:28,800 INFO L158 Benchmark]: Toolchain (without parser) took 781611.04ms. Allocated memory was 183.5MB in the beginning and 299.9MB in the end (delta: 116.4MB). Free memory was 140.8MB in the beginning and 234.3MB in the end (delta: -93.5MB). Peak memory consumption was 24.4MB. Max. memory is 8.0GB. [2022-01-28 15:02:28,800 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 183.5MB. Free memory was 142.1MB in the beginning and 142.0MB in the end (delta: 129.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 15:02:28,800 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.67ms. Allocated memory is still 183.5MB. Free memory was 140.8MB in the beginning and 139.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-28 15:02:28,800 INFO L158 Benchmark]: Boogie Preprocessor took 13.13ms. Allocated memory is still 183.5MB. Free memory was 139.2MB in the beginning and 138.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 15:02:28,800 INFO L158 Benchmark]: RCFGBuilder took 247.63ms. Allocated memory is still 183.5MB. Free memory was 138.2MB in the beginning and 126.8MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-28 15:02:28,801 INFO L158 Benchmark]: TraceAbstraction took 781324.29ms. Allocated memory was 183.5MB in the beginning and 299.9MB in the end (delta: 116.4MB). Free memory was 126.2MB in the beginning and 234.3MB in the end (delta: -108.1MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-01-28 15:02:28,801 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 183.5MB. Free memory was 142.1MB in the beginning and 142.0MB in the end (delta: 129.6kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.67ms. Allocated memory is still 183.5MB. Free memory was 140.8MB in the beginning and 139.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.13ms. Allocated memory is still 183.5MB. Free memory was 139.2MB in the beginning and 138.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 247.63ms. Allocated memory is still 183.5MB. Free memory was 138.2MB in the beginning and 126.8MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 781324.29ms. Allocated memory was 183.5MB in the beginning and 299.9MB in the end (delta: 116.4MB). Free memory was 126.2MB in the beginning and 234.3MB in the end (delta: -108.1MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * 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 constructing difference of abstraction (839states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (416 states constructed, input type IntersectNwa). - 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 constructing difference of abstraction (839states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (416 states constructed, input type IntersectNwa). - 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 constructing difference of abstraction (839states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (416 states constructed, input type IntersectNwa). - 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 constructing difference of abstraction (839states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (416 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 781.2s, OverallIterations: 666, TraceHistogramMax: 2, PathProgramHistogramMax: 654, EmptinessCheckTime: 0.5s, AutomataDifference: 250.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49896 SdHoareTripleChecker+Valid, 156.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49896 mSDsluCounter, 136040 SdHoareTripleChecker+Invalid, 129.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 49335 IncrementalHoareTripleChecker+Unchecked, 250818 mSDsCounter, 18654 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 405136 IncrementalHoareTripleChecker+Invalid, 473125 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18654 mSolverCounterUnsat, 13473 mSDtfsCounter, 405136 mSolverCounterSat, 1.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 36948 GetRequests, 17497 SyntacticMatches, 2521 SemanticMatches, 16930 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 124420 ImplicationChecksByTransitivity, 217.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=842occurred in iteration=663, InterpolantAutomatonStates: 10246, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.0s AutomataMinimizationTime, 665 MinimizatonAttempts, 151891 StatesRemovedByMinimization, 661 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.5s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 371.6s InterpolantComputationTime, 27169 NumberOfCodeBlocks, 27169 NumberOfCodeBlocksAsserted, 1955 NumberOfCheckSat, 38669 ConstructedInterpolants, 2068 QuantifiedInterpolants, 389960 SizeOfPredicates, 10525 NumberOfNonLiveVariables, 55732 ConjunctsInSsa, 12975 ConjunctsInUnsatCore, 1974 InterpolantComputations, 12 PerfectInterpolantSequences, 926/8267 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